A group of compounds derived from ammonia by substituting organic radicals for the hydrogens. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A group of enzymes including those oxidizing primary monoamines, diamines, and histamine. They are copper proteins, and, as their action depends on a carbonyl group, they are sensitive to inhibition by semicarbazide.
A group of naturally occurring amines derived by enzymatic decarboxylation of the natural amino acids. Many have powerful physiological effects (e.g., histamine, serotonin, epinephrine, tyramine). Those derived from aromatic amino acids, and also their synthetic analogs (e.g., amphetamine), are of use in pharmacology.
An alpha-adrenergic sympathomimetic amine, biosynthesized from tyramine in the CNS and platelets and also in invertebrate nervous systems. It is used to treat hypotension and as a cardiotonic. The natural D(-) form is more potent than the L(+) form in producing cardiovascular adrenergic responses. It is also a neurotransmitter in some invertebrates.
Cell surface proteins that bind biogenic amines with high affinity and regulate intracellular signals which influence the behavior of cells. Biogenic amine is a chemically imprecise term which, by convention, includes the catecholamines epinephrine, norepinephrine, and dopamine, the indoleamine serotonin, the imidazolamine histamine, and compounds closely related to each of these.
An indirect sympathomimetic. Tyramine does not directly activate adrenergic receptors, but it can serve as a substrate for adrenergic uptake systems and monoamine oxidase so it prolongs the actions of adrenergic transmitters. It also provokes transmitter release from adrenergic terminals. Tyramine may be a neurotransmitter in some invertebrate nervous systems.
Enzymes catalyzing the dehydrogenation of secondary amines, introducing a C=N double bond as the primary reaction. In some cases this is later hydrolyzed.
Ring compounds having atoms other than carbon in their nuclei. (Grant & Hackh's Chemical Dictionary, 5th ed)
An enzyme that catalyzes the oxidative deamination of naturally occurring monoamines. It is a flavin-containing enzyme that is localized in mitochondrial membranes, whether in nerve terminals, the liver, or other organs. Monoamine oxidase is important in regulating the metabolic degradation of catecholamines and serotonin in neural or target tissues. Hepatic monoamine oxidase has a crucial defensive role in inactivating circulating monoamines or those, such as tyramine, that originate in the gut and are absorbed into the portal circulation. (From Goodman and Gilman's, The Pharmacological Basis of Therapeutics, 8th ed, p415) EC
Drugs that mimic the effects of stimulating postganglionic adrenergic sympathetic nerves. Included here are drugs that directly stimulate adrenergic receptors and drugs that act indirectly by provoking the release of adrenergic transmitters.
A beta-hydroxylated derivative of phenylalanine. The D-form of dihydroxyphenylalanine has less physiologic activity than the L-form and is commonly used experimentally to determine whether the pharmacological effects of LEVODOPA are stereospecific.
A group of compounds that are derivatives of beta- aminoethylbenzene which is structurally and pharmacologically related to amphetamine. (From Merck Index, 11th ed)
A biochemical messenger and regulator, synthesized from the essential amino acid L-TRYPTOPHAN. In humans it is found primarily in the central nervous system, gastrointestinal tract, and blood platelets. Serotonin mediates several important physiological functions including neurotransmission, gastrointestinal motility, hemostasis, and cardiovascular integrity. Multiple receptor families (RECEPTORS, SEROTONIN) explain the broad physiological actions and distribution of this biochemical mediator.
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
The creation of an amine. It can be produced by the addition of an amino group to an organic compound or reduction of a nitro group.
Substances that increase the risk of NEOPLASMS in humans or animals. Both genotoxic chemicals, which affect DNA directly, and nongenotoxic chemicals, which induce neoplasms by other mechanism, are included.
Diazo derivatives of aniline, used as a reagent for sugars, ketones, and aldehydes. (Dorland, 28th ed)
Toluenes in which one hydrogen of the methyl group is substituted by an amino group. Permitted are any substituents on the benzene ring or the amino group.
An alkaloid found in the roots of Rauwolfia serpentina and R. vomitoria. Reserpine inhibits the uptake of norepinephrine into storage vesicles resulting in depletion of catecholamines and serotonin from central and peripheral axon terminals. It has been used as an antihypertensive and an antipsychotic as well as a research tool, but its adverse effects limit its clinical use.
The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
A class of compounds that contain a -NH2 and a -NO radical. Many members of this group have carcinogenic and mutagenic properties.
A chemically heterogeneous group of drugs that have in common the ability to block oxidative deamination of naturally occurring monoamines. (From Gilman, et al., Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p414)
Chemical agents that increase the rate of genetic mutation by interfering with the function of nucleic acids. A clastogen is a specific mutagen that causes breaks in chromosomes.
Integral membrane proteins of the LIPID BILAYER of SECRETORY VESICLES that catalyze transport and storage of biogenic amine NEUROTRANSMITTERS such as ACETYLCHOLINE; SEROTONIN; MELATONIN; HISTAMINE; and CATECHOLAMINES. The transporters exchange vesicular protons for cytoplasmic neurotransmitters.
Organic chemicals which have two amino groups in an aliphatic chain.
Biphenyl compounds substituted in any position by one or more amino groups. Permitted are any substituents except fused rings.
An enzyme that catalyzes the transfer of acetyl groups from ACETYL-COA to arylamines. It can also catalyze acetyl transfer between arylamines without COENZYME A and has a wide specificity for aromatic amines, including SEROTONIN. However, arylamine N-acetyltransferase should not be confused with the enzyme ARYLALKYLAMINE N-ACETYLTRANSFERASE which is also referred to as SEROTONIN ACETYLTRANSFERASE.
Precursor of epinephrine that is secreted by the adrenal medulla and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers and of the diffuse projection system in the brain arising from the locus ceruleus. It is also found in plants and is used pharmacologically as a sympathomimetic.
The rate dynamics in chemical or physical systems.
A sympathomimetic agent that acts predominantly at alpha-1 adrenergic receptors. It has been used primarily as a vasoconstrictor in the treatment of HYPOTENSION.
The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.
An aspect of monoamine oxidase, EC Catalyzes the oxidation of benzylamine to form benzaldehyde, ammonia and hydrogen peroxide.
The chemical alteration of an exogenous substance by or in a biological system. The alteration may inactivate the compound or it may result in the production of an active metabolite of an inactive parent compound. The alterations may be divided into METABOLIC DETOXICATION, PHASE I and METABOLIC DETOXICATION, PHASE II.
A foul-smelling diamine formed by bacterial decarboxylation of lysine.
Decarboxylated monoamine derivatives of TRYPTOPHAN.
The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Biogenic amines having only one amine moiety. Included in this group are all natural monoamines formed by the enzymatic decarboxylation of natural amino acids.
The art or practice of preparing food. It includes the preparation of special foods for diets in various diseases.
One of the catecholamine NEUROTRANSMITTERS in the brain. It is derived from TYROSINE and is the precursor to NOREPINEPHRINE and EPINEPHRINE. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement. A family of receptors (RECEPTORS, DOPAMINE) mediate its action.
A toxic diamine formed by putrefaction from the decarboxylation of arginine and ornithine.
A group of pyrido-indole compounds. Included are any points of fusion of pyridine with the five-membered ring of indole and any derivatives of these compounds. These are similar to CARBAZOLES which are benzo-indoles.
Very toxic industrial chemicals. They are absorbed through the skin, causing lethal blood, bladder, liver, and kidney damage and are potent, broad-spectrum carcinogens in most species.
Tests of chemical substances and physical agents for mutagenic potential. They include microbial, insect, mammalian cell, and whole animal tests.
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)
Compounds containing 1,3-diazole, a five membered aromatic ring containing two nitrogen atoms separated by one of the carbons. Chemically reduced ones include IMIDAZOLINES and IMIDAZOLIDINES. Distinguish from 1,2-diazole (PYRAZOLES).
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).
Sympathetic alpha-adrenergic agonist with actions like PHENYLEPHRINE. It is used as a vasoconstrictor in circulatory failure, asthma, nasal congestion, and glaucoma.
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
A methylated metabolite of norepinephrine that is excreted in the urine and found in certain tissues. It is a marker for tumors.
The prototypical tricyclic antidepressant. It has been used in major depression, dysthymia, bipolar depression, attention-deficit disorders, agoraphobia, and panic disorders. It has less sedative effect than some other members of this therapeutic group.
A general class of ortho-dihydroxyphenylalkylamines derived from tyrosine.
An amine derived by enzymatic decarboxylation of HISTIDINE. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter.
A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.
A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55.
A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts.
The removal of an amino group (NH2) from a chemical compound.
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).
A pyrrolo-quinoline having two adjacent keto-groups at the 4 and 5 positions and three acidic carboxyl groups. It is a coenzyme of some DEHYDROGENASES.
The products of chemical reactions that result in the addition of extraneous chemical groups to DNA.
Organic compounds containing a carbonyl group in the form -CHO.
The active sympathomimetic hormone from the ADRENAL MEDULLA. It stimulates both the alpha- and beta- adrenergic systems, causes systemic VASOCONSTRICTION and gastrointestinal relaxation, stimulates the HEART, and dilates BRONCHI and cerebral vessels. It is used in ASTHMA and CARDIAC FAILURE and to delay absorption of local ANESTHETICS.
A propylamine formed from the cyclization of the side chain of amphetamine. This monoamine oxidase inhibitor is effective in the treatment of major depression, dysthymic disorder, and atypical depression. It also is useful in panic and phobic disorders. (From AMA Drug Evaluations Annual, 1994, p311)

Long-term effects of N-2-chlorethyl-N-ethyl-2-bromobenzylamine hydrochloride on noradrenergic neurones in the rat brain and heart. (1/2065)

1 N-2-Chlorethyl-N-ethyl-2-bromobenzylamine hydrochloride (DSP 4) 50 mg/kg intraperitoneally, produced a long-term decrease in the capacity of brain homogenates to accumulate noradrenaline with significant effect 8 months after the injection. It had no effect on the noradrenaline uptake in homogenates from the striatum (dopamine neurones) and on the uptake of 5-hydroxytryptamine (5-HT) in various brain regions. 2 In vitro DSP 4 inhibited the noradrenaline uptake in a cortical homogenate with an IC50 value of 2 muM but was more than ten times less active on the dopamine uptake in a striatal homogenate and the 5-HT uptake in a cortical homogenate. 3 DSP 4 (50 mg/kg i.p.) inhibited the uptake of noradrenaline in the rat heart atrium in vitro but this action was terminated within 2 weeks. 4 DSP 4 (50 mg/kg i.p.) cuased a decrease in the dopamine-beta-hydroxylase (DBH) activity in the rat brain and heart. The onset of this effect was slow; in heart a lag period of 2-4 days was noted. In brain the DBH-activity in cerebral cortex was much more decreased than that in hypothalamus which was only slightly affected. A significant effect was still found 8 months after the injection. The noradrenaline concentration in the brain was greatly decreased for at least two weeks, whereas noradrenaline in heart was only temporarily reduced. 5 The long-term effects of DSP 4 on the noradrenaline accumulation, the DBH activity and noradrenaline concentration in the rat brain were antagonized by desipramine (10 mg/kg i.p.). 6 It is suggested that DSP 4 primarily attacks the membranal noradrenaline uptake sites forming a covalent bond and that the nerve terminals, as a result of this binding, degenerate.  (+info)

Analysis of gabapentin in serum and plasma by solid-phase extraction and gas chromatography-mass spectrometry for therapeutic drug monitoring. (2/2065)

A simple method for the determination of gabapentin (Neurontin) is described. The method uses solid-phase extraction by disk column and derivatization followed by gas chromatographic-mass spectrometric analysis. The single-step derivatization with MTBSTFA produces a t-BDMS derivative of both the carboxylic and amine moieties of the molecule. Each step of the procedure was optimized to assure reliable performance of the method. The assay limit of detection was 0.1 microg/mL with a linear range from 1.0 to 35 microg/mL. Within-run (n = 3) and between-run (n = 40) coefficients of variation were less than 8.2 and 15.9%, respectively. The method has proven reliable in routine production for more than a year, producing clean chromatography with unique ion fragments, consistent ion mass ratios, and no interferences. Statistical analysis of the gabapentin concentrations measured in 1020 random specimens over a 2-month period showed a mean concentration of 6.07 microg/mL with a standard deviation of 5.28.  (+info)

Gabapentin suppresses ectopic nerve discharges and reverses allodynia in neuropathic rats. (3/2065)

Repetitive ectopic discharges from injured afferent nerves play an important role in initiation and maintenance of neuropathic pain. Gabapentin is effective for treatment of neuropathic pain but the sites and mechanisms of its antinociceptive actions remain uncertain. In the present study, we tested a hypothesis that therapeutic doses of gabapentin suppress ectopic afferent discharge activity generated from injured peripheral nerves. Mechanical allodynia, induced by partial ligation of the sciatic nerve in rats, was determined by application of von Frey filaments to the hindpaw. Single-unit afferent nerve activity was recorded proximal to the ligated sciatic nerve site. Intravenous gabapentin, in a range of 30 to 90 mg/kg, significantly attenuated allodynia in nerve-injured rats. Furthermore, gabapentin, in the same therapeutic dose range, dose-dependently inhibited the ectopic discharge activity of 15 injured sciatic afferent nerve fibers through an action on impulse generation. However, the conduction velocity and responses of 12 normal afferent fibers to mechanical stimulation were not affected by gabapentin. Therefore, this study provides electrophysiological evidence that gabapentin is capable of suppressing the ectopic discharge activity from injured peripheral nerves. This action may contribute, at least in part, to the antiallodynic effect of gabapentin on neuropathic pain.  (+info)

Removal of non-specific serum inhibitors of haemagglutination of rubella virus by treatment with dodecylamine-gel. (4/2065)

The suitability of using dodecylamine-gel for removing the serum non-antibody-like inhibitors of haemagglutination by rubella was studied. Compared with kaolin and MnCl2/heparin treatment this new procedure appears to have a higher specificity since it removes the non-antibody-like inhibitors from serum without affecting the immunoglobulin level significantly. The potential application of this procedure in routine serological analysis for rubella virus infection is discussed.  (+info)

N-acetyltransferase 1 genetic polymorphism, cigarette smoking, well-done meat intake, and breast cancer risk. (5/2065)

N-Acetyltransferase 1 (NAT1), encoded by the polymorphic NAT1 gene, has been shown to be one of the major enzymes in human breast tissue that activates aromatic and heterocyclic amines. Humans are mainly exposed to these carcinogens through cigarette smoking and consumption of well-done meat. To test the hypothesis that variations in the NAT1 gene are related to breast cancer risk, particularly among women who smoke or consume high levels of well-done meat, a nested case-control study was conducted in a prospective cohort study of 41,837 postmenopausal Iowa women. Information on cigarette smoking and other breast cancer risk factors was obtained at the baseline survey conducted in 1986. DNA samples and information on the consumption of well-done meat were obtained, in the case-control study, from breast cancer cases diagnosed from 1992 to 1994 and a random sample of cancer-free cohort members. Genomic DNA samples obtained from 154 cases and 330 controls were assayed for 11 NAT1 alleles (NAT1*3, *4, *5, *10, *11, *14, *15, *16, *17, *19, and *22). The NAT1*4 allele was the predominant allele observed in this study population, accounting for 73.2% (72.4% in cases versus 73.8% in controls) of the total alleles analyzed. Compared to controls, breast cancer cases had a slightly higher frequency of the NAT1*10 allele (18.8% in cases versus 17.3% in controls) and a substantially higher frequency of the NAT1*11 allele (3.6% versus 1.2%). In multivariate analyses, we found a 30% [95% confidence interval (CI) = 0.8-1.9] elevated risk of breast cancer associated with the NAT1*10 allele and a nearly 4-fold (95% CI = 1.5-10.5) elevated risk associated with the NAT1*11 allele. The positive association of breast cancer with the NAT1*11 allele was more evident among smokers [odds ratio (OR) = 13.2, 95% CI = 1.5-116.0] and those who consumed a high level of red meat (OR = 6.1, 95% CI = 1.1-33.2) or consistently consumed their red meat well done (OR = 5.6, 95% CI = 0.5-62.7). The association of the NAT1*10 allele with breast cancer was mainly confined to former smokers (OR = 3.3, 95% CI = 1.2-9.5). These findings are consistent with a role for the NAT1 gene in the etiology of human breast cancer.  (+info)

An in vitro electrophysiological study on the effects of phenytoin, lamotrigine and gabapentin on striatal neurons. (6/2065)

We performed intracellular recordings from a rat corticostriatal slice preparation in order to compare the electrophysiological effects of the classical antiepileptic drug (AED) phenytoin (PHT) and the new AEDs lamotrigine (LTG) and gabapentin (GBP) on striatal neurons. PHT, LTG and GBP affected neither the resting membrane potential nor the input resistance/membrane conductance of the recorded cells. In contrast, these agents depressed in a dose-dependent and reversible manner the current-evoked repetitive firing discharge. These AEDs also reduced the amplitude of glutamatergic excitatory postsynaptic potentials (EPSPs) evoked by cortical stimulation. However, substantial pharmacological differences between these drugs were found. PHT was the most effective and potent agent in reducing sustained repetitive firing of action potentials, whereas LTG and GBP preferentially inhibited corticostriatal excitatory transmission. Concentrations of LTG and GBP effective in reducing EPSPs, in fact, produced only a slight inhibition of the firing activity of these cells. LTG, but not PHT and GBP, depressed cortically-evoked EPSPs increasing paired-pulse facilitation (PPF) of synaptic transmission, suggesting that a presynaptic site of action was implicated in the effect of this drug. Accordingly, PHT and GBP, but not LTG reduced the membrane depolarizations induced by exogenously-applied glutamate, suggesting that these drugs preferentially reduce postsynaptic sensitivity to glutamate released from corticostriatal terminals. These data indicate that in the striatum PHT, LTG and GBP decrease neuronal excitability by modulating multiple sites of action. The preferential modulation of excitatory synaptic transmission may represent the cellular substrate for the therapeutic effects of new AEDs whose use may be potentially extended to the therapy of neurodegenerative diseases involving the basal ganglia.  (+info)

Cancer chemopreventive mechanisms of tea against heterocyclic amine mutagens from cooked meat. (7/2065)

Cooking meat and fish under normal conditions produces heterocyclic amine mutagens, several of which have been shown to induce colon tumors in experimental animals. In our search for natural dietary components that might protect against these mutagens, it was found that green tea and black tea inhibit the formation of heterocyclic amine-induced colonic aberrant crypt foci (ACF) in the rat. Since ACF are considered to be putative preneoplastic lesions, we examined the inhibitory mechanisms of tea against the heterocyclic amines. In the initial studies using the Salmonella mutagenicity assay, green tea and black tea inhibited according to the concentration of tea leaves during brewing and the time of brewing; a 2-3-min brew of 5% green tea (w/v) was sufficient for >90% antimutagenic activity. N-hydroxylated heterocyclic amines, which are direct-acting mutagens in Salmonella, were inhibited by complete tea beverage and by individual components of tea, such as epigallocatechin-3-gallate (EGCG). Inhibition did not involve enhanced mutagen degradation, and EGCG and other catechins complexed only weakly with the mutagens, suggesting electrophile scavenging as an alternative mechanism. Enzymes that contribute to the metabolic activation of heterocyclic amines, namely microsomal NADPH-cytochrome P450 reductase and N, O-acetyltransferase, were inhibited by tea in vitro. Studies in vivo established that tea also induces cytochromes P450 and Phase II enzymes in a manner consistent with the rapid metabolism and excretion of heterocyclic amines. Collectively, the results indicate that tea possesses anticarcinogenic activity in the colon, and this most likely involves multiple inhibitory mechanisms.  (+info)

Phospholipid-assisted refolding of an integral membrane protein. Minimum structural features for phosphatidylethanolamine to act as a molecular chaperone. (8/2065)

Escherichia coli-derived phosphatidylethanolamine (PE) or PE with fully saturated fatty acids was able to correct in vitro a defect in folding in the lipid-dependent epitope 4B1 of lactose permease (LacY) resulting from in vivo assembly in the absence of PE. PE plasmalogen, PE with two unsaturated fatty acids, and lyso-PE, which all do not favor bilayer organization, did not support proper refolding. Proper refolding occurred when these latter lipids were mixed with a bilayer-forming lipid (phosphatidylglycerol), which alone could not support refolding. L-Phosphatidylserine (PS; natural diastereomer) did support proper refolding. PE derivatives of increasing degrees of methylation were progressively less effective in supporting refolding, with phosphatidylcholine being completely ineffective. Therefore, the properties of nonmethylated aminophospholipids capable of organization into a bilayer configuration are essential for the recovery of the native state of epitope 4B1 after misassembly in vivo in the absence of PE. Neither D-PS (sn-glycero-1-phosphate backbone) nor P-D-S (D-serine in the head group) is competent in supporting proper refolding unless used in binary mixtures with phosphatidylglycerol. The detailed characterization of phospholipid-assisted refolding reported here further supports a specific rather than nonspecific role for PE in structural maturation of lactose permease in vivo (Bogdanov, M., and Dowhan, W. (1998) EMBO J. 17, 5255-5264).  (+info)

Disclosed is an aromatic amine derivative represented by the general formula (1) or (2) below and having a diphenylamino group wherein a cycloalkyl group is bonded to a benzene ring. Also disclosed is an organic electroluminescent device wherein an organic thin film composed of one or more layers including at least a light-emitting layer is interposed between a cathode and an anode, and at least one layer of the organic thin film contains the aromatic amine derivative by itself or as a component of a mixture. This organic electroluminescent device has long life and high luminous efficiency, and is capable of emitting blue light with high color purity. The aromatic amine derivative enables to realize such an organic electroluminescent device. (1) (2) (In the general formula (1), A,sub,1,/sub,-A,sub,4,/sub, respectively represent a hydrogen atom or the like, and a-d respectively represent an integer of 0-5. In this connection, at least one of a-d represents an integer of not less than 1, and in ...
To increase the reliability and success rate of drug discovery, efforts have been made to increase the C(sp3) fraction and avoid flat molecules. sp3-Rich enantiopure amines are most frequently encountered as chiral auxiliaries, synthetic intermediates for pharmaceutical agents and bioactive natural products. Streamlined construction of chiral aliphatic amines has long been regarded as a paramount challenge. Mainstream approaches, including hydrogenation of enamines and imines, C-H amination, and alkylation of imines, were applied for the synthesis of chiral amines with circumscribed skeleton structures; typically, the chiral carbon centre was adjacent to an auxiliary aryl or ester group. Herein, we report a mild and general nickel-catalysed asymmetric reductive hydroalkylation to effectively convert enamides and enecarbamates into drug-like α-branched chiral amines and derivatives. This reaction involves the regio- and stereoselective hydrometallation of an enamide or enecarbamate to generate a
TY - JOUR. T1 - Simultaneous aqueous chlorination of amine-containing pharmaceuticals. AU - Liu, Yu-Jung. AU - Liu, Hui-Sz. AU - Hu, Ching-Yao. AU - Lo, Shang-Lien. PY - 2019. Y1 - 2019. N2 - Amine-containing pharmaceuticals such as acetaminophen, diclofenac, and sulfamethoxazole are the most often detected pharmaceuticals in wastewater and other aquatic environments. Amine-containing pharmaceuticals can be effectively removed by chlorination. These drugs, however, may coexist in wastewater. Thus, they may compete with each other, and their chlorinated products may react with each other to form new products. In this study, competitive effects of the above three amine-containing pharmaceuticals by chlorination and their products were investigated. The priority of chlorination of these compounds was dependent upon the pH of the solution, due to the dissociation of the compounds and hypochlorite. It followed the order of sulfamethoxazole , diclofenac , acetaminophen in an acidic condition, the ...
Enzyme cascade reactions for the synthesis of long chain aliphatic amines such as (Z)-12-aminooctadec-9-enoic acid, 10- or 12-aminooctadecanoic acid, and 10-amino-12-hydroxyoctadecanoic acid from renewable fatty acids were investigated. (Z)-12-aminooctadec-9-enoic acid was produced from ricinoleic acid ((Z)-12-hydroxyoctadec-9-enoic acid) via (Z)-12-ketooctadec-9-enoic acid with a conversion of 71% by a two-step in vivo biotransformation involving a long chain secondary alcohol dehydrogenase (SADH) from Micrococcus luteus and a variant of the amine transaminase (ATA) from Vibrio fluvialis. 10-Aminooctadecanoic acid was prepared from oleic acid ((Z)-octadec-9-enoic acid) via 10-hydroxyoctadecanoic acid and 10-ketooctadecanoic acid by an in vivo three-step biocatalysis reaction involving not only the SADH and ATA variants, but also a fatty acid double bond hydratase (OhyA) from Stenotrophomonas maltophilia. 10-Aminooctadecanoic acid was produced at a total rate of 4.4 U/g dry cells with a ...
Abstract. Multivalent metal salts, such as ferric chloride and sulfate, are active and versatile catalysts for the amidation of aliphatic fatty acids with long-chain aliphatic amines.. ...
Modified aliphatic amine Hardener KB-NF,Particularly suitable for winter and spring carbon fiber plastic, steel sticky toughness curing agent_OKCHEM
The pharmacological effects of A-4, a bis 4-methylpiperidine tertiary amine derivative of hemicholinium-3, were investigated. Systemic administration (i.p.) of this compound produced a dose-dependent reduction in acetylcholine content of several brain regions. A dose of 40 mg/kg of A-4 produced a 40% reduction in acetylcholine content in the corpus striatum and this reduction was maintained for over 4 hr. Increased choline content was found concurrent with the reduction in acetylcholine content. Reversal of the A-4-induced reductions in acetylcholine content was seen with eserine and oxotremorine but not with choline chloride. Acute treatment with A-4 appeared selective for cholinergic neurons as no significant changes were seen in norepinephrine or serotonin parameters of any of the brain regions assayed. Dopamine turnover was increased in the striatum. The neurochemical changes produced by A-4 were not seen with the bis 4-methylpiperidine quaternary amine, A-5, or hemicholinium-3 after ...
N,N-Substituted amine derivatives were designed by utilizing a bioisosterism strategy. Consequently, twenty-two compounds were synthesized and evaluated for their inhibitory activity against CETP. Structure-activity relationship (SAR) studies indicate that hydrophilic groups at the 2-position of the tetrazole and 3,5-bistrifluoromethyl groups on the benzene ring provide important contributions to the potency. Among these compounds, compound 17 exhibited excellent CETP inhibitory activity (IC50 = 0.38 ± 0.08 μM) in vitro. Furthermore, compound 17 was selected for an in vitro metabolic stability study.
TY - JOUR. T1 - Approaches towards the synthesis of fluoro(cyclo)alkylamines.. AU - Windhorst, A.D.. AU - Bechger, L.. AU - Visser, G.W.M.. AU - Menge, W.M.P.B.. AU - Leurs, R.. AU - Timmerman, H.. AU - Herscheid, J.D.M.. PY - 1996. Y1 - 1996. N2 - The synthesis of fluoro(cyclo)alkylamines 1-amino-6-fluorohexane (1), 1-amino-7-fluoroheptane (2), cis/trans-4-fluorocyclohexylamine (3a,b) and cis-4-fluoromethylcyclohexylamine (4) has been investigated for use as synthons for histamine receptor ligands for use in PET.. AB - The synthesis of fluoro(cyclo)alkylamines 1-amino-6-fluorohexane (1), 1-amino-7-fluoroheptane (2), cis/trans-4-fluorocyclohexylamine (3a,b) and cis-4-fluoromethylcyclohexylamine (4) has been investigated for use as synthons for histamine receptor ligands for use in PET.. U2 - 10.1016/S0022-1139(96)03457-4. DO - 10.1016/S0022-1139(96)03457-4. M3 - Article. VL - 80. SP - 35. EP - 40. JO - Journal of Fluorine Chemistry. JF - Journal of Fluorine Chemistry. SN - 0022-1139. ER - ...
TABLE-US-00002 TABLE 2 Insecticidal (Heteroarylalkyl)alkane Thio and Oxo Amine Derivatives Compound Characterization Melting Point (° C.) of Solids Molecular Formula Or Physical State 1-1 C33H36Cl2N6O4S2 OIL 1-2 C23H24Cl2N6O2S2 OIL 1-3 C27H40Cl2N6O2S2 OIL 1-4 C25H36Cl2N6O2S2 OIL 1-5 C25H32Cl2N6O2S2 OIL 1-6 C19H20Cl2N6O2S4 OIL 1-7 C21H32Cl2N6O2S4 OIL 1-8 C21H22Cl2N8O2S2 OIL 1-9 C17H18Cl2N4O2S2 GUM 1-10 C18H21ClN4O3S2 OIL 1-11 C11H15ClN4O2S2 OIL 1-12 C13H15ClN4O2S2 OIL 1-13 C15H23ClN4O2S2 OIL 1-14 C14H21ClN4O2S2 OIL 1-15 C14H19ClN4O2S2 OIL 1-16 C11H13ClN4O2S3 OIL 1-17 C12H19ClN4O2S3 OIL 1-18 C12H14ClN5O2S2 OIL 1-19 C14H17ClN4O2S2 OIL 1-20 C25H28Cl2N6O2S2 OIL 1-21 C14H21ClN4O3S OIL 2-1 C32H31Cl4N5O2S2 OIL 2-2 C24H25Cl2N5O2S2 OIL 2-3 C34H37Cl2N5O4S2 OIL 2-4 C26H37Cl2N5O2S2 OIL 2-5 C28H41Cl2N5O2S2 OIL 2-6 C26H33Cl2N5O2S2 OIL 2-7 C20H21Cl2N5O2S4 OIL 2-8 C22H33Cl2N5O2S4 OIL 2-9 C22H23Cl2N7O2S2 OIL 2-10 C24H29Cl2N5O2S2 OIL 2-11 C12H16ClN3O2S2 OIL 2-12 C18H19Cl2N3O2S2 OIL 2-13 C14H16ClN3O2S2 OIL 2-14 ...
Practice solving Addition of Amine Derivatives problems. Master even the most complex scientific problems with our step-by-step explanation videos.
TY - JOUR. T1 - Atmospheric amines - Part I. A review. AU - Ge, Xinlei. AU - Wexler, Anthony S.. AU - Clegg, Simon L.. PY - 2011/1. Y1 - 2011/1. N2 - Amines are emitted by a wide range of sources and are ubiquitous atmospheric organic bases. Approximately 150 amines and about 30 amino acids have been identified in the atmosphere. We review the present knowledge of atmospherically relevant amines with respect to their sources, fluxes, and dynamics including gas-phase reactions, gas-to-particle conversion and deposition. The health effects of aliphatic and aromatic amines are briefly summarized as well as the atmospheric occurrence and reactivity of amino acids and urea.. AB - Amines are emitted by a wide range of sources and are ubiquitous atmospheric organic bases. Approximately 150 amines and about 30 amino acids have been identified in the atmosphere. We review the present knowledge of atmospherically relevant amines with respect to their sources, fluxes, and dynamics including gas-phase ...
Compounds having two reactive functional groups are described that can be used as a tethering compound to immobilize an amine-containing material to a substrate. The first reactive functional group can be used to provide attachment to a surface of a substrate. The second reactive functional group is a N-sulfonyldicarboximide group that can be reacted with an amine-containing material, particularly a primary aliphatic amine, to form a connector group between the substrate and the amine-containing material. The invention also provides articles and methods for immobilizing amine-containing materials to a substrate.
We present an efficient and simple, metal-free and solvent-free silica gel-promoted synthesis of functionalized conjugated dienes by sequential aza-Michael/Michael reactions starting from commercially available primary amines and propiolic esters. The scope and usefulness of the method is demonstrated on 31 examples, including a range of propiolic esters, aliphatic amines and differently substituted aromatic amines. In the case of aliphatic amines, the products are obtanied within 0.5-4 h in 52-85% yield compared with 3.5-22 h under classical solution-phase synthesis, proceeding in similar or lower yields. Particular usefulness of the method is found in the case of weakly nucleophilic aromatic amines, which provide products in 21-73% yield during 2.5-9.5 h compared with 0-49% during 1-6 days under standard solution-phase conditions and in the case of more hydrophobic esters yielding products in 47-79% during 1-3 h compared with 0-45% during 4-114 h in the solvent. ...
Aliphatic amines are popular motifs in biologically relevant molecules, so chemists have myriad tools for assembling C-N bonds. Methods that make those bonds enantioselectively are particularly valuable because they can produce chiral drugs and unnatural amino acids, which are useful for studying biology. While chiral transition-metal catalysts are effective for making aromatic amines, they fall short when it comes to making aliphatic amines. These compounds tend to coordinate to the metal, poisoning the catalyst and scrambling its ability to work enantioselectively. Researchers led by Nankai Universitys Shou-Fei Zhu and Qi-Lin Zhou have managed to get around these problems by creating a reaction that uses two catalysts in tandem (Science 2019, DOI: 10.1126/science.aaw9939). The reaction (example shown) features an achiral metal catalyst-a homoscorpionate copper complex-which forms a carbene from a diazo ester. The homoscorpionate ligand protects the copper from another reactant, an aliphatic ...
Business Standard News: Corporate Action: Alkyl Amines Chemicals (ALKYLAMINE) - Business Standard News and more from Business Standard News
Alpha-oligopeptide / Glutamine or derivatives / N-acyl-alpha amino acid or derivatives / Alpha-amino acid amide / Cysteine or derivatives / Alpha-amino acid / D-alpha-amino acid / N-substituted-alpha-amino acid / Alpha-amino acid or derivatives / Fatty acylFatty acid / Dicarboxylic acid or derivatives / N-acyl-amine / Fatty amide / Organic disulfide / Dialkyldisulfide / Carboxamide group / Secondary carboxylic acid amide / Amino acid or derivatives / Amino acid / Sulfenyl compound / Carboxylic acid / Secondary aliphatic amine / Secondary amine / Primary amine / Organopnictogen compound / Organic oxygen compound / Organic nitrogen compound / Carbonyl group / Hydrocarbon derivative / Amine / Organic oxide / Primary aliphatic amine / Organosulfur compound / Organooxygen compound / Organonitrogen compound / Aliphatic acyclic compound ...
Alkyl Amines Chemicals Limited operates in the Chemicals & Allied Products sector. Alkyl Amines Chemicals Limited is engaged in the business of specialty chemicals. The Company is involved in the manufacture of organic and inorganic chemical compounds. Its products include Methylamine, Ethylamine, Isopropylamine, Propylamine, Butylamine, Ethylhexylamine, Cyclohexylamine, Diallylamine, Dimethylpropylamine, Di-Methylbutylamine, Mono-n-Butylamine, Diisobutylamine, Hydroxylnovaldiamine, Imino Bis Propylamine, Methylamine Hydrochloride and Dimethylimidazolidone. It supplies amines and amine-based chemicals to the pharmaceutical, agrochemical, rubber chemical and water treatment industries. It has approximately two manufacturing sites with over nine production plants and related utilities at Patalganga and Kurkumbh in Maharashtra. The Company caters to both domestic and international markets. It has various facilities to manufacture a range of specialty chemicals with its inhouse developed technologies.
In the systematic study of amine … LiCl [amines = NH3, CH3NH2, (CH3)2NH] complexes the possibility of an ion-pair structure and the effect of methylation on the stabilization energy is investigated. ΔEis evaluated by the SCF/4-31G method and augmented by the approximate dispersion energy calculated perturbationally. The interaction energy decreases with the increasing number of methyl groups in the amine. The dispersion energy plays a negligible role in the stabilization of complexes. None of the systems studied are ion pairs; their Li bonds are of a so-called molecular type. Due to the divergence of the multipole expansion, the attempt to correct the 4-31G stabilization energies via the electrostatic energy fails. The relative order of the ΔE in the series of complexes is verified instead in the extended basis set calculation. The lithium bonds are compared with their H-bonded analogues.. ...
Easily label your own tag ligands & other small molecules. Mix-n-Stain™ CF® dye small ligand labeling kits are designed for rapid labeling of small (MW ~ 150 - 5,000) and relatively high affinity biological ligands (or substrates). Labeling takes about 30 minutes, without a final purification step. The ligands to be labeled must contain an aliphatic amine group that is not required for biological activity of the ligand. The amine group will form a covalent linkage with the reactive CF® dye provided in the kit. For example, suitable ligands or substrates include SNAP-tag®, CLIP-tag™ and HaloTag® ligands with an aliphatic amine. Many other small ligands are also possible candidates if they meet the criteria described above.. Simply mix your small molecule ligand with the reaction buffer and the optimally formulated dye provided, and incubate for 30 minutes, followed by a brief 5 minute quenching step. No reactive Mix-n-Stain™ dye is available at the end of labeling; therefore the ...
0018]As for stabilizers, for instance there are amine compounds such as primary amine, secondary amine, and tertiary amine; ammonium carbamate, ammonium carbonate, and ammonium bicarbonate based compounds; phosphorus compounds such as phosphine, phosphite, and phosphate; sulfur compounds including thiol and sulfide. They consist of these compounds or mixture of more than at least one of them. As the concrete amine compounds, for example, they are selected from the group consisting of methyl amine, ethyl amine, n-propyl amine, isopropyl amine, n-butyl amine, isobutyl amine, isoamyl amine, n-hexyl amine, 2-ethylhexyl amine, n-heptyl amine, n-octyl amine, isooctyl amine, nonyl amine, decyl amine, dodecyl amine, hexadecyl amine, octadecyl amine, docodecyl amine, cyclopropyl amine, cyclopentyl amine, cyclohexyl amine, allyl amine, hydroxy amine, ammonium hydroxide, methoxy amine, 2-ethanolamine, methoxyethyl amine, 2-hydroxypropyl amine, 2-hydroxy-2-methylpropyl amine, methoxypropyl amine, cyanoethyl ...
A transition metal-free strategy for the dehydrogenative β-sulfonylation of tertiary cyclic amines is described. N-iodosuccinimide facilitates regioselective oxidative sulfonylation at C-H bonds positioned β to the nitrogen atom of tertiary amines, installing enaminyl sulfone functionality in cyclic systems. Mild reaction conditions, broad functional group tolerance and a wide substrate scope are demonstrated. The nucleophilic character of the enaminyl sulfone is harnessed, demonstrating potential application for scaffold diversification. ...
Heterocyclic amines are a group of chemical compounds, many of which can be formed during cooking. They are found in meats that are cooked to the well done stage, in pan drippings and in meat surfaces that show a brown or black crust. Epidemiological studies show associations between intakes of heterocyclic amines and cancers of the colon, rectum, breast, prostate, pancreas, lung, stomach/esophagus and animal feeding experiments support a causal relationship. The U.S. Department of Health and Human Services Public Health Service labeled several heterocyclic amines as likely carcinogens in its 13th Report on Carcinogens. Changes in cooking techniques reduce the level of heterocyclic amines. More than 20 compounds fall into the category of heterocyclic amines, often abbreviated HCAs[1]. Table 1 shows the chemical name and abbreviation of those most commonly studied. All four of these compounds are included in the 13th Report on Carcinogens. The compounds found in food are formed when creatine (a ...
Decades of drug-discovery research have shown that drug molecules that need to cross the cell membrane exhibit a relatively narrow range of physicochemical properties, e.g., molecular mass, hydrophobicity and polarity. A recent survey of a dataset of human approved drugs has found that 27% of these are aliphatic amines and 20% are carboxylic acids [1,2]. In an aqueous environment at neutral pH, aliphatic amines have a propensity to be protonated and carry an electric charge of +1e.. ...
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Global (North America, Europe and Asia-Pacific, South America, Middle East and Africa) Copper Paste Market 2018 Forecast to 2023. COPPER PASTE is a high temperature anti-seize lubricant. A soft, copper-coloured paste, based on micronized copper powder and synergistic anti-oxidant, anti-corrosion and anti-wear additives suspended in premium grade stable oil. It is an effective anti-seize formulation, preventing metal-to-metal contact, seizing, galling, and fretting corrosion. Scope of the Report: This report focuses on .... February 2018 , $4880 ,View Details>> ...
Data on 6,500 pesticides, insecticides and herbicides including toxicity, water pollution, ecological toxicity, uses and regulatory status.
Wherever you look, a part of us is there From coatings to transportation and energy to construction, weve been enabling progress through Responsible Chemistry for over half a century ...
Amine salts, amic acids, amic acid amine salts bis-amides and imides of oil-soluble thio-bis-(C12-50 alkyl lactone acid), e.g. a secondary hydrogenated tallow amide of dithio-bis-(C16 -C24 alkyl lactone carboxylic acid), are useful in combination with a coadditive hydrocarbon such as an amorphous hydrocarbon or a hydrogenated polybutadiene in improving the cold flow properties of distillate hydrocarbon oils.
Three different cyclic amine dyes, 9-(2-chlorophenyl)-9H-carbazole (CPCz; C18H12ClN), 10-(2-chlorophenyl)-10H-phenoxazine (CPPo; C18H12ClNO), and 10-(2-chlorophenyl)-10H-phenothiazine (CPPt; C18H12ClNS), were synthesized to systematically investigate their optical properties and electronic band structures with molecular microstructure. By the insertion of oxygen or sulfur atom into carbazole moiety, the absorption and photoluminescence (PL) spectra showed bathochromic shift, and the Stokes shift was increased. Ionization potential of CPCz was measured as 5.75eV, on the other hand, CPPo and CPPt showed their ionization potentials of 5.37 and 5.39eV, respectively. The minute difference in chemical structure such as insertion of oxygen or sulfur atom caused huge change of optical property and electronic band structure. ...
Novel amine and amidine derivatives of di-O-(n-higher alkyl and alkenyl)-glycerols and -propanediols, and their pharmaceutically acceptable acid addition salts, are useful for combating viral infections in mammals. Of particular interest is 1,3-di-O-(n-hexadecyl)-2-O-(3-aminopropyl)-glycerol, and its pharmaceutically acceptable acid addition salts.
Overview:. Product name: Dabco 8154. Alias: 2-ethylhexanoic acid solution of triethylenediamine, Dabco 8154, amine catalyst Dabco 8154, catalyst Dabco 8154, acid-blocked tertiary amine catalyst, polyurethane delayed gel catalyst, delayed gel catalyst 8154. Product description: Dabco 8154 is light yellow liquid at room temperature, soluble in water;. Product properties. Appearance: light yellow liquid. Viscosity (25℃, mPa.s): 160. Density (25℃, g/cm3): 1.04. Water solubility: soluble in water. Flash point (PMCC, ℃): 110. Hydroxyl value (mgKOH/g): 548. Product Usage. Dabco 8154 is an acid-blocked tertiary amine catalyst, which is mainly used to promote the reaction of urethane (polyol-isocyanate) and has the effect of delaying the initiation of the reaction;. Dabco 8154 is mainly used for polyurethane molded foam, prolonging milking time, improving fluidity and improving processing efficiency of foam.. Introduction:. Dabco 8154 catalyst is a blocked tertiary amine polyurethane catalyst, ...
Solvation significantly affects the basicity of amines. N-H groups strongly interact with water, especially in ammonium ions. Consequently, the basicity of ammonia is enhanced by 1011 by solvation. The intrinsic basicity of amines, i.e. the situation where solvation is unimportant, has been evaluated in the gas phase. In the gas phase, amines exhibit the basicities predicted from the electron-releasing effects of the organic substituents. Thus tertiary amines are more basic than secondary amines, which are more basic than primary amines, and finally ammonia is least basic. The order of pKbs (basicities in water) does not follow this order. Similarly aniline is more basic than ammonia in the gas phase, but ten thousand times less so in aqueous solution.[11]. In aprotic polar solvents such as DMSO, DMF, and acetonitrile the energy of solvation is not as high as in protic polar solvents like water and methanol. For this reason, the basicity of amines in these aprotic solvents is almost solely ...
The far infrared spectra of a number of aliphatic amines have been recorded as dilute solutions in cyclohexane. A characteristic band with center at 225 ± 10 cm,sup,−1,/sup, is present in the spectra of aliphatic primary amines with a primary α-carbon atom. On the basis of the deuterium shift this band is assigned to the amino torsion. The effects of branching at the α-carbon, coupling of methyl and amino torsions, and intramolecular association on the frequencies of NH,sub,2,/sub, torsions are discussed ...
US EPA PC Code ); 039301 (US EPA PC Code Text ); 2-Hydroxypropanoic acid, compd. with 1-dodecanamine (1:1); 2-Hydroxypropanoic acid, compd. with 1-dodecanamine (1:1); 2002 (CA DPR Chem Code) ); 7491-20-5 (CAS number); 7491205; 7491205 (CAS number without hyphens); Dodecylamine lactate; DODECYLAMINE LACTATE (CA DPR Chem Code Text ); Dodecylaminelactate; Lactic acid, compd. with dodecylamine (1:1); Lactic acid, compd. with dodecylamine (1:1 ...
Tertiary Amines Market - By Region:. United States, Europe, China, Japan, Southeast Asia, India & Central & South America. This study mainly helps understand which market segments or Region or Country they should focus in coming years to channelize their efforts and investments to maximize growth and profitability. Get a Customization report as Per Requirements @ https://www.inforgrowth.com/customization/6613285/Tertiary Amines-market. Reasons for buying this report:. * It offers an analysis of changing competitive scenarios.. * For making informed decisions in the businesses, it offers analytical data with strategic planning methodologies.. * It offers a six-year assessment of Tertiary Amines Market.. *It helps in understanding the major key product segments.. * Researchers throw light on the dynamics of the market such as drivers, restraints, trends, and opportunities.. * It offers regional analysis of Tertiary Amines Market along with business profiles of several stakeholders.. * It offers ...
Angelino, S., Suess, D. T., and Prather, K. A.: Formation of aerosol particles from reactions of secondary and tertiary alkylamines: Characterization by aerosol time-of-flight mass spectrometry, Environ. Sci. Technol., 35, 3130-3138, https://doi.org/10.1021/es0015444, 2001. Berndt, T., Stratmann, F., Sipilä, M., Vanhanen, J., Petäjä, T., Mikkilä, J., Grüner, A., Spindler, G., Lee Mauldin III, R., Curtius, J., Kulmala, M., and Heintzenberg, J.: Laboratory study on new particle formation from the reaction OH + SO2: influence of experimental conditions, H2O vapour, NH3 and the amine tert-butylamine on the overall process, Atmos. Chem. Phys., 10, 7101-7116, https://doi.org/10.5194/acp-10-7101-2010, 2010. Bzdek, B. R., Ridge, D. P., and Johnston, M. V.: Amine exchange into ammonium bisulfate and ammonium nitrate nuclei, Atmos. Chem. Phys., 10, 3495-3503, https://doi.org/10.5194/acp-10-3495-2010, 2010. Cadle, S. H. and Mulawa, P. A.: Low-molecular-weight aliphatic amines in exhaust from ...
|b|Amines|/b| |br/|Long chain aliphatic amines are widely used to combat corrosion. Octadecylamine is used to protect condensate lines by forming a protective film. Amines that are volatile in steam are used to neutralise carbon dioxide in boiler condensate. They are also used to increase the pH value of feedwater or boiler water in order to prevent corrosion.
Aromatic amine epoxy hardener [5], Aromatic amine epoxy hardener [5] supplier, Aromatic amine epoxy hardener [5] distributor, CAS -, Aromatic amine epoxy hardener [5] manufacturer, Aromatic amine epoxy hardener [5] wholesale
A dispersant derivatized from a functionalized hydrocarbon and a polyamine having one primary amine and 1-10, preferably 3-8 secondary or tertiary amines; preferably where said functionalized hydrocarbon is a Koch-derived hydrocarbon.
No data available for the determination of toxicokinetics, metabolism and distribution. In general, lower primary aliphatic amines are metabolized to the corresponding carboxylic acid and urea. Assessment of Toxicokinetic Behaviour 3-(Dimethylamino)propylamine (Cas-No. 109-55-7) is a colorless liquid with a molecular weight of 102.2 g/mol and a vapor pressure of 5.9 hPa (20°C). It is miscible in water and the log Po/w is -0.352. Evidence for systemic availability of 3-(Dimethylamino)propylamine comes from acute (oral, dermal, inhalation) and subacute toxicity. The LD50 for oral acute toxicity in rats was calculated as ca. 1600 mg/kg body weight (BASF, 1958). Main clinical signs observed were drowsiness and staggered gait. At necropsy, decomposition of abdominal cavity and haemorrhagic stomachs were observed. In three further studies the test substance caused likewise moderate toxicity after a single ingestion LD50 = 1037 mg/kg BW (Hoechst, 1979), LD50 = 922 mg/kg BW (Bayer, 1979), LD50=1870 ...
a class of organic compounds of nitrogen that may be considered as derived from ammonia (NH3) by replacing one or more of the hydrogen atoms by organic radicals, such as CH3 or C6H5, as in methylamine and aniline. The former is a gas at ordinary temperature and pressure, but other amines are liquids or solids. All amines are basic in nature and usually combine readily with hydrochloric or other strong acids to form salts ...
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Aradur®Aradur® curing agents are supplied in liquid or solid form and can be used in conjunction with Araldite® epoxy resins to achieve a broad range of thermal, mechanical and electrical properties. This complete line of high performance curing agents includes reactive polyamides, polyamido amines, aliphatic amines, cycloaliphatic amines, aromatic amines, anhydrides and novolacs ...
The chemoselective acylation of primary aliphatic amines has been achieved in under ten minutes (and for aromatic amines under 120 min) using vibration ball-milling, avoiding undesirable solvents which are typically employed for such reactions (e.g.DMF). Under optimised conditions, the synthesis of amides in
This invention relates to certain cyclic amine derivatives of Formula (I) that are CCR-3 receptor antagonists, pharmaceutical compositions containing them, methods for their use and methods for preparing these compounds.
Amines are widely used in the production of numerous products for multiple industries and their use is expected to increase. Global amines market is expected to reach over $14 billion by 2020, with an average annual growth of 3.5%. Primary amines are most useful in the larger markets of ethanolamines and fatty amines.Cur ... Read more ...
Relative Strength Of Organic Bases: Higher the electron density on nitrogen, more is the basic character of amine. A compound is basic in nature, if its conjugate acid can be stabilized through resonance …
Amine dehydrogenase (AmDH) possesses tremendous potential for the synthesis of chiral amines because AmDH catalyzes the asymmetric reductive amination of ketone with high enatioselectivity. Although a reductive application of AmDH is favored in practice, the oxidative route is interesting as well for the preparation of chiral amines. Here, the kinetic resolution of racemic amines using AmDH was first extensively studied, and the AmDH reaction was combined with an NADH oxidase (Nox) to regenerate NAD+ and to drive the reaction forward. When the kinetic resolution was carried out with 10 mM rac-2-aminoheptane and 5 mM rac-α-methylbenzylamine (α-MBA) using purified enzymes, the enantiomeric excess (ee) values were less than 26% due to the product inhibition of AmDH by ketone and the inhibition of Nox by the substrate amine. The use of a whole-cell biocatalyst co-expressing AmDH and Nox apparently reduces the substrate and product inhibition, and/or it increases the stability of the enzymes. Fifty
A primary aliphatic amine with excellent resistance to oxidation, fluidity, low viscosity over a wide range of temperature, outstanding color stability, and high solubility in petroleum hydrocarbons.
Amines[edit]. *Piperazine: cyclizine, clocinizine, hydroxyzine, meclozine, cetirizine, dotarizine, cinnarizine. *Benzazepine: ...
Amines[edit]. Amines follow nitrogen rule. Odd molecular ion mass-to-charge ratio suggests existence of odd numbers of ... Nonetheless, molecular ion peaks are weak in aliphatic amines due to the ease of fragmentation next to amines. Alpha-cleavage ... Aromatic amines have intense molecular ion peaks. For anilines, they prefer to lose a hydrogen atom before the expulsion of HCN ... reactions are the most important fragmentation mode for amines; for 1° n-aliphatic amines, there is an intense peak at m/z 30.[ ...
Amines[edit]. *Tertiary Amines: NTBR, NTCL, NTI, NTS, SEN, AGN. *Diamines: DSDN ...
Amine scrubbing[edit]. Main article: Amine gas treating. The primary application for CO2 scrubbing is for removal of CO. 2 from ... Gary T. Rochelle (2009). "Amine Scrubbing for CO2 Capture". Science. 325 (5948): 1652-4. Bibcode:2009Sci...325.1652R. doi: ... Virtually the only technology being seriously evaluated involves the use of various amines, e.g. monoethanolamine. Cold ... while for the amine system this cost is estimated to be $72. The project ended in 2010,estimating that the total capital ...
pH-dependent primary, secondary, or tertiary amines; primary and secondary amines become positively charged at pH , 10:[27] ... Amine oxides[edit]. *Lauryldimethylamine oxide. See also[edit]. .mw-parser-output .portal{border:solid #aaa 1px;padding:0}.mw- ... The cationic part is based on primary, secondary, or tertiary amines or quaternary ammonium cations. The anionic part can be ... The most common biological zwitterionic surfactants have a phosphate anion with an amine or ammonium, such as the phospholipids ...
Conversion to other biologically active amines[edit]. *The histidine amino acid is a precursor for histamine, an amine produced ... This change in chemical shifts can be explained by the presumably decreased hydrogen bonding of an amine over an ammonium ion, ...
Amine protecting groups[edit]. BOC glycine. The tert-butyloxycarbonyl group is marked blue. ...
Small: Trace amine (Phe). N-methylphenethylamine. NMPEA. hTAAR1. -. Small: Trace amine (Phe/Tyr). Tyramine. TYR. hTAAR1, hTAAR2 ... Small: Trace amine (Phe/Tyr). Synephrine. Syn. hTAAR1. -. Small: Trace amine (Trp). Tryptamine. hTAAR1, various serotonin ... Small: Trace amine (Phe). Phenethylamine. PEA. Human trace amine-associated receptors: hTAAR1, hTAAR2. -. ... Small: Trace amine (Trp). N-methyltryptamine. NMT. hTAAR1, various serotonin receptors. -. Lipid. Anandamide. AEA. Cannabinoid ...
ISBN 0-08-017275-X. Lawrence, Stephen A. (2006). "An Introduction to the Amines". Amines. Synthesis, Properties and ...
Perfluoro-tert.-amines". Journal of the Chemical Society (Resumed). 0: 102. doi:10.1039/jr9510000102. ISSN 0368-1769. Aymonino ... H. G. Ang; Y. C. Syn (1974). "The chemistry of bis(trifluoromethyl)amine compounds". Advances in Inorganic Chemistry and ...
When the amine is used as an electrophile, the reaction is called electrophilic amination. Electron-rich organic substrates ... Amination is the process by which an amine group is introduced into an organic molecule. This type of reaction is important ... Amination can occur in a number of ways including reaction with ammonia or another amine such as an alkylation, reductive ... Acid-catatlyzed hydroamination Many alkyl amines are produced industrially by the amination of alcohols using ammonia in the ...
It is a colorless liquid with an amine-like odor. Tributylamine is used as a catalyst (proton acceptor) and as a solvent in ... "Amines, Aliphatic". doi:10.1002/14356007.a02_001. ISBN 3527306730. Cite journal requires ,journal= (help). ...
Eller, Karsten; Henkes, Erhard; Rossbacher, Roland; Höke, Hartmut (2000). "Amines, Aliphatic". doi:10.1002/14356007.a02_001. ... Like other tertiary amines, it catalyzes the formation of urethane foams and epoxy resins. It is also useful in ...
Löffler, Karl (1 April 1910). "Über eine neue Bildungsweise primärer und sekundärer Amine aus Ketonen" [About a new way of ... Diisopropylamine is a common amine nucleophile in organic synthesis. Because it is bulky, it is a more selective nucleophile ... Diisopropylamine is a secondary amine with the chemical formula (Me2CH)2NH (Me = methyl). Diisopropylamine is a colorless ... "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/14356007.a02_001. ISBN 978- ...
"Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_001. ...
... is an organic chemical compound (specifically, an amine) with the formula CH3CH2CH(NH2)CH3. It is a colorless ... sec-Butylamine is one of the four isomeric amines of butane, the others being n-butylamine, tert-butylamine, and isobutylamine ... "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_001. United ...
The weight of the salt byproduct is greater than the weight of the amine. In the laboratory, the Ritter reaction suffers from ... An estimated 10,000 tons/y (year: 2000) of this and related lipophilic amines are prepared in this way. Otherwise, the Ritter ... Eller, Karsten; Henkes, Erhard; Rossbacher, Roland; Höke, Hartmut (2000). "Amines, Aliphatic". Ullmann's Encyclopedia of ... reaction is most useful in the formation of amines and amides of pharmaceutical interest. Real world applications include ...
The molecule behaves like an amine base, undergoing protonation and N-alkylation (e.g. Quaternium-15). The dominant use of ... Eller, K.; Henkes, E.; Rossbacher, R.; Höke, H. (2000). "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. ... synthesis of amines from alkyl halides). Hexamethylenetetramine is the base component to produce RDX and, consequently, C-4 as ...
This process gives a variety of amines, especially ethylene amines which are separated by distillation and sublimation. TETA is ... The branched isomer tris(2-aminoethyl)amine and piperazine derivatives may also be present in commercial samples of TETA. The ... Eller K, Henkes E, Rossbacher R, Höke H (2005). "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: ... like many amines, assumes a yellowish color due to impurities resulting from air-oxidation. It is soluble in polar solvents. ...
This heterocyclic amine consists of a six-membered ring containing five methylene bridges (-CH2-) and one amine bridge (-NH-). ... "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_001. Marvel, ... Hall, H. K. (1957). "Correlation of the Base Strengths of Amines". J. Am. Chem. Soc. 79 (20): 5441-5444. doi:10.1021/ ... It is a colorless liquid with an odor described as objectionable, and typical of amines. The name comes from the genus name ...
A diamine is an amine with exactly two amino groups. Diamines are used as monomers to prepare polyamides, polyimides, and ... 1,4-Diazacycloheptane 1,4-Diazacycloheptane Xylylenediamines are classified as alkylamines since the amine is not directly ... Karsten Eller, Erhard Henkes, Roland Rossbacher, Hartmut Höke (2005). "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial ... "Nucleophilicity Trends of Amines". Master Organic Chemistry. 2018-05-07. Retrieved 2019-08-18. ...
Biogenic Amines. 18 (3): 319. doi:10.1163/1569391041501933. Blier P, Curet O, Chaput Y, de Montigny C (July 1991). " ...
Roose, Peter; Eller, Karsten; Henkes, Erhard; Rossbacher, Roland; Höke, Hartmut (2015). "Amines, Aliphatic". Ullmann's ... amines, and carbon monoxide". J. Org. Chem. 40 2819-2822. T.Yoshino et al. (1977). "Synthetic studies with carbonates. Part 6. ...
Vogt, Peter F.; Gerulis, John J. (2000). "Amines, Aromatic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley- ...
Its derivatives like aspartic esters, secondary amines, aldimines and ketoimines serve as curatives in systems of polyurea. In ... 2-Methylpentamethylenediamine is an organic compound part of the amine family with the formula H2NCH2CH2CH2CH(CH3)CCH2NCH2. A ... Eller, Karsten; Henkes, Erhard; Rossbacher, Roland; Höke, Hartmut (15 June 2000). "Amines, Aliphatic". Ullmann's Encyclopedia ...
Roose P, Eller K, Henkes E, Rossbacher R, Höke H (2005). "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. ... "An acute case of primary aromatic amines migrating from cooking utensils" (PDF). Memorandum for the Danish Veterinary and Food ...
Eller, K.; Henkes, E.; Rossbacher, R.; Höke, H. (2000). "Amines, Aliphatic". Ullmann's Encyclopedia of Industrial Chemistry. ...
... intermediate imines can also undergo attack by amine products to afford secondary and tertiary amines: 2 R-C≡N + 4 H2 → (R-CH2) ... However, other catalysts, such as cobalt boride, also can be selective for primary amine production: R-C≡N + 2 H2 → R-CH2NH2 A ... In nitrile reduction a nitrile is reduced to either an amine or an aldehyde with a suitable chemical reagent. The catalytic ... Reducing agents for the non-catalytic conversion to amines include lithium aluminium hydride, lithium borohydride, diborane, or ...
Tris(2-aminoethyl)amine (N(CH2CH2NH2)3) is a branched polyamine. A related tripodal polyamine is 1,1,1-tris(aminomethyl)ethane ... Synthetic polyamines Tris(2-aminoethyl)amine Cyclen 1,4,7-Triazacyclononane 1,1,1-Tris(aminomethyl)ethane Subunit of ... Lawrence, Stephen A. (2004). Amines: synthesis, properties and applications. Cambridge University Press. p. 64. ISBN 978-0-521- ... Eller, Karsten; Henkes, Erhard; Rossbacher, Roland; Höke, Hartmut (2005). "Amines, Aliphatic". Ullmann's Encyclopedia of ...
Like other amines, it is a weak base, compared to strong bases such as NaOH, but it is a stronger base than its aromatic analog ... It is a colorless liquid, although, like many amines, samples are often colored due to contaminants. It has a fishy odor and is ... It is a building block for pharmaceuticals (e.g., mucolytics, analgesics, and bronchodilators). The amine itself is an ... Some sweeteners are derived from this amine, notably cyclamate. The herbicide hexazinone and the anesthetic hexylcaine are ...
Cyclic amines-Cyclic amines are either secondary or tertiary amines. Examples of cyclic amines include the 3-membered ring ... Important amines include amino acids, biogenic amines, trimethylamine, and aniline; see Category:Amines for a list of amines. ... Lower amines are named with the suffix -amine.. methylamine Higher amines have the prefix amino as a functional group. IUPAC ... "Amine definition and meaning". Collins English Dictionary. Retrieved 2017-03-28.. *^ "amine - definition of amine in English". ...
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Mohamed Amine Khamsi (born 1959 in Morocco) is an American/Moroccan mathematician. His research interests include nonlinear ... Retrieved from "https://en.wikipedia.org/w/index.php?title=Mohamed_Amine_Khamsi&oldid=726611152" ...
Modern psychopharmacology gave rise to the amine hypotheses of affective disorders and the search began for amine metabolites ... Modern psychopharmacology gave rise to the amine hypotheses of affective disorders and the search began for amine metabolites ... Gjerris A., Rafaelsen O.J. (1985) Peptides and Amines in Affective Disorders. In: Pichot P., Berner P., Wolf R., Thau K. (eds) ... Vestergaard, P., Sorensen, R., Hoppe, E., Rafaelsen, O.J., Yates, C.M., and Nicolaou, N., 1978, Biogenic amine metabolites in ...
Alkyl Amines Chemicals Ltd has informed BSE that the meeting of the Board of Directors of the Company to be held on February 06 ... ALKYL AMINES CHEMICALS LTD.-$has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 06/02/ ... ALKYL AMINES CHEMICALS LTD.-$has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 06/11/ ... Alkyl Amines Chemicals Ltd has submitted to BSE the Shareholding Pattern for the Period Ended March 31, 2020. For more details ...
Disclaimer: The information provided on HealthWorld Online is for educational purposes only and IS NOT intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek professional medical advice from your physician or other qualified healthcare provider with any questions you may have regarding a medical condition ...
PRNewswire/ -- The Amines - Global Market Trajectory & Analytics report has been added to ResearchAndMarkets.coms offering. ... Fatty Amines Segment Corners a 15% Share in 2020. In the global Fatty Amines segment, USA, Canada, Japan, China and Europe will ... This segment currently accounts for a 25.9% share of the global Amines market.. The U.S. Accounts for Over 27.1% of Global ... The Amines market in the U. S. is estimated at US$4.6 Billion in the year 2020. The country currently accounts for a 27.06% ...
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I work internationally and mainly with customers in the lifestyle industry. My signature aesthetic is a balance of both timeless and contemporary design, simplify in order to amplify. Everything i do, i do in an open and transparent collaborative manner. I look forward to doing business with you !
Search: Amine Mezni *. Format. Summary. Summary (text). Abstract. Abstract (text). MEDLINE. XML. PMID List. MeSH and Other Data ...
In chemistry, primene amines are mixtures of long-chain branched primary amines. One member of this class of amine is tert- ... Primene amines are used as used in solvent extractions. Eller, Karsten; Henkes, Erhard; Rossbacher, Roland; Höke, Hartmut (2000 ... "Amines, Aliphatic". Ullmanns Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_001. Nekovář ...
Business Units sales activities of relevant amines and defined derivatives to the joint venture as well as its amines plant in ... an agreement to establish a 50-50 joint venture as the global platform for production and sales of amines and selected amines ... Germany and production output from its amines plant in Brazil.. - Headquartered in Muttenz, Switzerland, ICS has the highest ...
PureCoat amine supports growth PureCoat amine supports growth Increase growth of human bone-marrow-derived hMSCs & hASC with ... Enhance Cell Attachment, Proliferation, and Post-thaw Recovery with Corning® PureCoat Amine Corning PureCoat Amine and Carboxyl ... Corning PureCoat Amine. Corning PureCoat Carboxyl. Applications. *Culture of primary cells, transfected, transformed, and ... Contact your authorized distributor to order PureCoat amine and carboxyl surfaces.. Contact your authorized distributor to ...
PureCoat amine supports growth PureCoat amine supports growth Increase growth of human bone-marrow-derived hMSCs & hASC with ... Enhance Cell Attachment, Proliferation, and Post-thaw Recovery with Corning® PureCoat Amine Corning PureCoat Amine and Carboxyl ... Corning PureCoat Amine. Corning PureCoat Carboxyl. Applications. *Culture of primary cells, transfected, transformed, and ... PureCoat Amine/Carboxyl. We use cookies to ensure the best experience on our website. ...
These secondary amines also serve as valuable chiral building blocks for the synthesis of atropisomeric phosphoramidites used ... Chiral amines have found widespread application in asymmetric synthesis serving, for instance, as chiral bases in ... In a one-pot synthesis, C2-symmetrical secondary amines could be obtained in high diastereoselectivities starting from (R)-α- ... Additionally, chiral amines are prevalent, essential parts of many drugs and drug candidates. ...
... is a ammonium ion derivative (CHEBI:35274) methylated primary amine(1+) (CHEBI: ... CHEBI:131823 - methylated primary amine(1+). Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ... An organic cation obtained by protonation of any methylated primary amine; major species at pH 7.3.. ...
CHEBI:30631 - tris(2-aminoethyl)amine. Main. ChEBI Ontology. Automatic Xrefs. Reactions. Pathways. Models. ... N,N-bis(2,3-dihydroxybenzoyl)-N-hexanoyltren (CHEBI:51950) has functional parent tris(2-aminoethyl)amine (CHEBI:30631). ...
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... amine: Amines are classified as primary, secondary, or tertiary depending on whether one, two, or three of the hydrogen atoms ... In amine. Amines are classified as primary, secondary, or tertiary depending on whether one, two, or three of the hydrogen ... Other articles where Primary amine is discussed: ... Primary amine. chemical compound. THIS IS A DIRECTORY PAGE. ...
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R-5.4.2 Secondary and tertiary amines. R-5.4.3 Imines. R-5.4.4 Hydroxylamines. R-5.4.5 Amine oxides. This HTML reproduction is ... R-5.4.1 Primary amines Primary amines, NH2R may be named according to one of three methods as follows:. (a) by citing the name ... b) by adding the suffix "-amine" to the name of the parent hydride RH;. (c) by adding "-amine" to the substituent name for the ...
Amid the COVID-19 crisis, the global market for Amines estimated at US$16. 8 Billion in the year 2020, is projected to reach a ... by Amine Type: 2012-2019 Table 72: French Amines Market Share Analysis by Amine Type: 2012 VS 2020 VS 2027 Table 73: Amines ... by Amine Type: 2012-2019 Table 78: German Amines Market Share Breakdown by Amine Type: 2012 VS 2020 VS 2027 Table 79: Amines ... US$ Million by Amine Type: 2020 to 2027 Table 101: Amines Market in Russia by Amine Type: A Historic Review in US$ Million for ...
... amine or his 13 phenylethyl)dimethylsilyl] amine replace bis (trimethylsilyl) amine of Example 3, tris(dirnethylsilyl) amine is ... amine, bis(octadecyldimethylsilyl)amine, bis- (naphthyldimethylsilyl) amine, bis (diphenylethylsilyl) amine, bis( ... A) a bis(organosilyl)amine selected from the group consisting of bis(dimethylsilyl)amine and bis(triorganosilyl) amine where ... The bis(dimethylsilyl)amine and the bis(triorganosilyl) amine can be prepared by known methods, such as sparging an organic ...
Amine definition, any of a class of compounds derived from ammonia by replacement of one or more hydrogen atoms with organic ... Words nearby amine. Amin, Aminah, aminase, aminate, Amindivi Islands, amine, amino, aminoacetic acid, amino acid, amino-acid ... OTHER WORDS FROM amine. a·min·ic [uh-mee-nik, uh-min-ik], /əˈmi nɪk, əˈmɪn ɪk/, adjectivea·min·i·ty [uh-min-i-tee], /əˈmɪn ɪ ti ... amine. *. Amine extended her arms, and Philip pressed her to his bosom. ...
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  • Aromatic amines have the nitrogen atom connected to an aromatic ring. (wikipedia.org)
  • Important primary alkyl amines include, methylamine , most amino acids , and the buffering agent tris , while primary aromatic amines include aniline . (wikipedia.org)
  • Aromatic amines, such as aniline , have their lone pair electrons conjugated into the benzene ring, thus their tendency to engage in hydrogen bonding is diminished. (wikipedia.org)
  • Benzidines and aromatic amines contain nitrogen atoms inside or attached to benzene-type rings. (cdc.gov)
  • Aromatic amines are used in insecticides or in polymer production. (cdc.gov)
  • Heterocyclic aromatic amines (HCAA) are an important class of carcinogens formed during combustion of cigarettes and cooking meats at high temperature (Turesky, R.J., Zhang, L., et al. (cdc.gov)
  • Heterocyclic aromatic amines in urine are measured by an isotope-dilution high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (ID HPLC-ESI MS/MS). For "total" HCAA assays, the urine samples are fortified with internal standards (ISTD), and hydrolyzed in basic condition at 70°C for 5 hours. (cdc.gov)
  • Heterocyclic aromatic amines were measured in a special smoking subsample of persons 18 years and older. (cdc.gov)
  • Dyes aromatic amines are used in dye production amines react with nitric (III) acid to produce salt The salts undergo reactions to produce a coloured azo-compound Methyl orange is used as a pH indicator Sunset yellow FCF is used in orange Jello 3. (prezi.com)
  • Tests monitor carcinogenic aromatic amines, aid in work decontamination. (cdc.gov)
  • Chemical spot tests for aromatic amines are described, which are used to monitor working areas, and aid decontamination. (cdc.gov)
  • For the carcinogenic aromatic amines under discussion physical and chemical means are used, vacuum cleaning and scrubbing with a methanolic hydrochloric-acid solution with surfactant. (cdc.gov)
  • Tertiary (3°) amines -In tertiary amines, nitrogen has three organic substituents. (wikipedia.org)
  • Cyclic amines - Cyclic amines are either secondary or tertiary amines. (wikipedia.org)
  • N -methylpiperidine and N -phenylpiperidine are examples of cyclic tertiary amines. (wikipedia.org)
  • Amines are classified as primary, secondary, or tertiary depending on whether one, two, or three of the hydrogen atoms of ammonia have been replaced by organic groups. (britannica.com)
  • Acid acceptors which can be used are pyridine, picolines and tertiary amines. (google.com)
  • A fourth subcategory is determined by the connectivity of the substituents attached to the nitrogen: Cyclic amines-Cyclic amines are either secondary or tertiary amines. (wikipedia.org)
  • What made you want to look up tertiary amine ? (merriam-webster.com)
  • N- methylaminomethane By: Eulah S. & Yezarni W. Tertiary Amines three alkyl groups replacing all three hydrogens from the ammonia molecule Ex. (prezi.com)
  • RNH 2 (primary amines), R 2 NH (secondary amines), R 3 N (tertiary amines). (iupac.org)
  • In terms of type, the global fatty amines market is segmented as primary fatty amines, secondary fatty amines, and tertiary fatty amines. (reportlinker.com)
  • The suitable carbonyl compounds contain a ketonic oxygen, for example one can use acetophenone or xanthone, and the amines can be primary, secondary or tertiary amines, for example, one can use butyldiethanolamine, triethanolamine, di-n-butylamine or morpholine. (google.ca)
  • Nearly half of small-molecule pharmaceuticals among the top 200 drugs by retail sales in 2019 contain an enantioenriched aliphatic amine as the key structural element 3 . (nature.com)
  • In the global Fatty Amines segment, USA , Canada , Japan , China and Europe will drive the 6.6% CAGR estimated for this segment. (prnewswire.com)
  • Fatty amines are the nitrogen derivatives of alcohols, fatty acids, and olefins, manufactured from natural sources, petrochemical raw materials, and fats and oils. (reportlinker.com)
  • Fatty amines are cationic surface-active compounds, which adhere to surfaces by either chemical or physical bonds. (reportlinker.com)
  • Commercial products are manufactured using fatty amines as reactive intermediates. (reportlinker.com)
  • Technavio's analysts forecast the global fatty amines market to grow at a CAGR of 7.01% during the period 2017-2021. (reportlinker.com)
  • The report covers the present scenario and the growth prospects of the global fatty amines market for 2017-2021. (reportlinker.com)
  • Technavio's report, Global Fatty Amines Market 2017-2021, has been prepared based on an in-depth market analysis with inputs from industry experts. (reportlinker.com)
  • The global fatty amines market is driven by growing water treatment chemicals industry and increasing demand for agro-chemicals and asphalt additives, mainly in the developing countries. (thefreedictionary.com)
  • IUPAC however does not recommend this convention, [ citation needed ] but prefers the alkanamine form, e.g. pentan-2-amine. (wikipedia.org)
  • Following vesicular release, the biogenic amine neurotransmitters dopamine, norepinephrine and serotonin are actively cleared from extracellular spaces by presynaptic transporters. (nih.gov)
  • Heterocyclic amines: human carcinogens in cooked food? (unboundmedicine.com)
  • During the frying of meat and fish, genotoxic heterocyclic amines (HCAs) are formed. (unboundmedicine.com)
  • TY - JOUR T1 - Heterocyclic amines: human carcinogens in cooked food? (unboundmedicine.com)
  • We have taken a set of heterocyclic amine structures and used molecular dynamic calculations to dock these molecules into the active site of a computational model of the cytochrome P-450 1A1 enzyme. (unt.edu)
  • Secondary (2°) amines -Secondary amines have two organic substituents (alkyl, aryl or both) bound to the nitrogen together with one hydrogen. (wikipedia.org)
  • Hydrogen bonding significantly influences the properties of primary and secondary amines. (wikipedia.org)
  • In a one-pot synthesis, C 2 -symmetrical secondary amines could be obtained in high diastereoselectivities starting from ( R )-α-ethylbenzylamine or ( S )-α-ethylbenzylamine, respectively ( Scheme 27 ). (sigmaaldrich.com)
  • These secondary amines also serve as valuable chiral building blocks for the synthesis of atropisomeric phosphoramidites used in highly enantioselective copper-catalyzed conjugate additions 2 or in iridium-catalyzed allylic substitutions. (sigmaaldrich.com)
  • My first thought on seeing this reaction was that I wished it ran (conceptually) in the opposite direction: I would very much like something that turned an alkane chain into a secondary amine, or a cyclopentane into a piperidine. (sciencemag.org)
  • Systematic names for some common amines: Hydrogen bonding significantly influences the properties of primary and secondary amines. (wikipedia.org)
  • In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one. (wikipedia.org)
  • CH3 -- CH2 -- NH2 aminoethane Secondary Amines two alkyl groups replacing two hydrogens from the ammonia molecule Ex. (prezi.com)
  • ZURICH--Clariant AG (CLN.VX) Friday said it and Wilmar International Limited, an Asian agribusiness group, have signed an agreement to establish a 50-50 joint venture as the global platform for production and sales of amines and selected amines derivatives. (marketwatch.com)
  • Clariant will contribute its Industrial & Consumer Specialties (ICS) Business Unit's sales activities of relevant amines and defined derivatives to the joint venture as well as its amines plant in Germany and production output from its amines plant in Brazil. (marketwatch.com)
  • organic compounds that contain an amine functional group derivatives of ammonia (NH3) Classes of Amines Primary Amines one alkyl group replacing one hydrogen from the ammonia molecule Ex. (prezi.com)
  • Herein, we report a mild and general nickel-catalysed asymmetric reductive hydroalkylation to effectively convert enamides and enecarbamates into drug-like α-branched chiral amines and derivatives. (nature.com)
  • 26 October 2012 - Swiss specialty chemicals company Clariant AG (VTX:CLN) said on Friday it had agreed with Singaporean agribusiness firm Wilmar International Limited (SGX:F34) to form an equally-owned joint venture focused on production and sales of amines and selected amines derivatives globally. (thefreedictionary.com)
  • Amines were supplied by Sigma-Aldrich and were used as received: diethyl-enetriamine-DETA (98% purity), aminoethylethanolamine--AEEA (99% purity), diethanolamine--DEA (98% purity), triethanolamine--TEA (puriss. (thefreedictionary.com)
  • Chiral amines have found widespread application in asymmetric synthesis serving, for instance, as chiral bases in enantioselective deprotonation reactions 1 or being valuable substances for resolving racemic mixtures of acids. (sigmaaldrich.com)
  • Additionally, chiral amines are prevalent, essential parts of many drugs and drug candidates. (sigmaaldrich.com)
  • Chiral amines play an important role in stereoselective organic synthesis. (sigmaaldrich.com)
  • While classically available through racemic resolution with optically active acids, biotechnological approaches also open a way to chiral amines. (sigmaaldrich.com)
  • Due to the wide range of substrates tolerated by the enzymes, a large variety of diff erent chiral amines and chiral aminoalcohols are commercially available. (sigmaaldrich.com)
  • Amines of the type NHRR′ and NRR′R″ are chiral: the nitrogen center bears four substituents counting the lone pair. (wikipedia.org)
  • sp 3 -Rich enantiopure amines are most frequently encountered as chiral auxiliaries, synthetic intermediates for pharmaceutical agents and bioactive natural products. (nature.com)
  • Streamlined construction of chiral aliphatic amines has long been regarded as a paramount challenge. (nature.com)
  • Fig. 1: Design of a modular enamide/enecarbamate reductive hydroalkylation for the synthesis of chiral aliphatic amines. (nature.com)
  • a Representative drug molecules demonstrating the universal existence of chiral aliphatic amines in biologically active molecules. (nature.com)
  • b Catalytic asymmetric reductive hydroalkylation of enamides and enecarbamates enables rapid access to the privileged chiral aliphatic amines, complementing mainstream approaches that are limited by auxiliary groups to access satisfactory stereoselectivity. (nature.com)
  • It was assumed that this reaction involved regio- and stereoselective hydrometallation of an enamide or enecarbamate to generate a catalytic amount of enantioenriched alkylnickel intermediate, followed by C-C bond formation with alkyl electrophile to yield chiral amine. (nature.com)
  • Primary (1°) amines -Primary amines arise when one of three hydrogen atoms in ammonia is replaced by an alkyl or aromatic group. (wikipedia.org)
  • Amines, alkyl and aryl alike, are organized into three subcategories (see table) based on the number of carbon atoms adjacent to the nitrogen: Primary (1°) amines-Primary amines arise when one of three hydrogen atoms in ammonia is replaced by an alkyl or aromatic group. (wikipedia.org)
  • H-bonds form between hydrogen atoms of amines and oxygen atoms of water water is a polar solvent, and can dissolve amines, which are polar solutes nitrogen atom with a lone pair of electrons 3. (prezi.com)
  • Preparing amines from nitriles Nitriles are molecules containing the -CN group Reduction (gaining electrons) of nitriles can prepare amines A reducing agent, such as LiAIH4, is used Hydrogen bonds also exists between nitrogen atoms of amines and hydrogen atoms of water (in primary amines) 3. (prezi.com)
  • Amine er en av de tre stipendiatene som er en del av Dig-Eco-prosjektet (2018-2022) som retter seg mot tre aspekter av digitalisering: energi, helse og økonomi. (ntnu.no)
  • FILE - In this file photo from March 27, 2018, Morocco midfielder Amine Harit prior to the start of a friendly soccer match between Morocco and Uzbekistan in Casablanca, Morocco. (usatoday.com)
  • Rapper Amine first made international headlines when he controversially called out his fans at his 2018 Coachella gig. (mtv.com.au)
  • Although some "trace amines" have clearly defined roles as neurotransmitters in invertebrates, the extent to which they function as true neurotransmitters in vertebrates has remained speculative. (pnas.org)
  • We have demonstrated that two of these receptors bind and/or are activated by trace amines. (pnas.org)
  • The cloning of mammalian GPCRs for trace amines supports a role for trace amines as neurotransmitters in vertebrates. (pnas.org)
  • The identification of this family of receptors should rekindle the investigation of the roles of trace amines in mammalian nervous systems and may potentially lead to the development of novel therapeutics for a variety of indications. (pnas.org)
  • In addition to these classical amines, there exists a class of "trace amines" that are found in very low levels in mammalian tissues, and include tyramine, β-phenylethylamine (β-PEA), tryptamine, and octopamine ( 1 ). (pnas.org)
  • The rapid turnover of trace amines, as evidenced by their dramatic increases following treatment with monoamine oxidase (MAO) inhibitors or deletion of the MAO genes, suggests that the levels of trace amines at neuronal synapses may be considerably higher than predicted by steady-state measures ( 2 - 5 ). (pnas.org)
  • The role of trace amines as neurotransmitters in invertebrates is well established and octopamine is thought to be the sympathetic nervous system counterpart to NE ( 6 - 9 ). (pnas.org)
  • Although there is clinical literature that supports a role for trace amines in depression as well as other psychiatric disorders and migraine ( 2 , 3 , 17 - 20 ), the role of trace amines as neurotransmitters in mammalian systems has not been thoroughly examined. (pnas.org)
  • Because they share common structures with the classical amines and can displace other amines from their storage vesicles, trace amines have been referred to as "false transmitters" ( 21 ). (pnas.org)
  • Thus, many of the effects of trace amines are indirect and are caused by the release of endogenous classical amines. (pnas.org)
  • However, there is a growing body of evidence suggesting that trace amines function independently of classical amine transmitters and mediate some of their effects via specific receptors (for review, see refs. (pnas.org)
  • However, although binding sites in brain and other tissues have been reported, no specific receptors for these trace amines have yet been identified conclusively. (pnas.org)
  • We now report the identification of a family of related mammalian GPCRs of which two members have been shown to specifically bind and/or be activated by trace amines. (pnas.org)
  • Examples of cyclic amines include the 3-membered ring aziridine and the six-membered ring piperidine . (wikipedia.org)
  • In contrast to other ants in the genus Monomorium that produce cyclic amines, extracts of Monomorium floricola contain (Z)-7-tetradecenylamine (1) and (Z)-9-tetradecenylamine (2). (usda.gov)
  • A second more cathodic reduction potential appears at -1.1 V, which can be attributed to the reduction of the oxime to the primary amine, as the oxime shows a reduction potential at -1.02 V. (erowid.org)
  • A primary aliphatic amine with excellent resistance to oxidation, fluidity, low viscosity over a wide range of temperature, outstanding color stability, and high solubility in petroleum hydrocarbons. (dow.com)
  • First, the report provides a basic overview of the Amines industry including definitions, classifications, applications and industry chain structure. (pitchengine.com)
  • Compounds with a nitrogen atom attached to a carbonyl group, thus having the structure R-CO-NR′R″, are called amides and have different chemical properties from amines. (wikipedia.org)
  • In organic chemistry, amines (/əˈmiːn, ˈæmiːn/, UK also /ˈeɪmiːn/) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. (wikipedia.org)
  • Preparing amines from amides Amides (organic compounds with carbonyl functional group) can be reduced to produce amines LiAlH4 can be used as a reducing agent Uses of Amines 1. (prezi.com)
  • 204159.23 6 Claims ABSTRACT OF THE DISCLOSURE Various combinations of certain organic carbonyl photosensitizer compounds and certain organic amine activators exert an unexpected beneficial etfect on the photopolymerization of certain polymerizable monomers or oligomers and coating compositions containing the same. (google.ca)
  • Biogenic amines (BAs) are small molecular organic nitrogenous compounds (bases), polar or semipolar. (intechopen.com)
  • Higher amines have the prefix amino as a functional group. (wikipedia.org)
  • Amino Acids in nature, important amines act as amino acids amino acids are vital to the body since they form proteins Proteins provide structure, function and regulation of the body's organs and tissues 2. (prezi.com)
  • Biogenic amines are a group of naturally occurring amines derived by enzymatic decarboxylation of amino acids. (mpbio.com)
  • Amid the COVID-19 crisis, the global market for Amines estimated at US$16.8 Billion in the year 2020, is projected to reach a revised size of US$26.6 Billion by 2027, growing at a CAGR of 6.8% over the analysis period 2020-2027. (prnewswire.com)
  • These species are not amines but are quaternary ammonium cations and have a charged nitrogen center. (wikipedia.org)
  • Visiongain assesses that the global amines market will reach $14.43bn in 2016. (prnewswire.co.uk)
  • 5) The study reveals the regional prospects for amines in volume (KT) and market value ($) terms from 2016-2026 with each region further segmented by the 7 applications. (prnewswire.co.uk)
  • Global Amines Consumption 2016 Market Research Report ​is a new market research publication announced by Reportstack. (pitchengine.com)
  • Norepinephrine (NE), dopamine (DA), and serotonin (5-HT) are classical biogenic amine neurotransmitters whose well characterized effects are mediated by interactions with subfamilies of receptors that belong to the rhodopsin superfamily of G protein-coupled receptors (GPCRs). (pnas.org)
  • Enzyme Immunoassay (EIA) and Radioimmunoassay (RIA) test kits provide the accurate assessment of various biogenic amine neurotransmitters, including dopamine, norepinephrine (noradrenaline), epinephrine (adrenaline), histamine, melatonin and serotonin. (mpbio.com)
  • Amines are used widely in bioactive molecules, drugs, and various organic materials, and preparing them is one of the most important tasks for synthetic chemists in both academia and industry. (eurekalert.org)
  • Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. (wikipedia.org)
  • Shape of Functional Group amines have a triangular pyramidal shape due to its three bonding electron pairs and its lone pair of electrons Reactions of Preparation 1. (prezi.com)
  • Our study establishes a functional link between natural amines and the innate immune system and identifies CXCR4 as a potential 'on-off' switch of pDC activity with therapeutic potential. (nature.com)
  • Modern psychopharmacology gave rise to the amine hypotheses of affective disorders and the search began for amine metabolites that could fulfil our hopes for biological markers of depression and mania. (springer.com)
  • Three of the four human receptors from this family are present in the amygdala, possibly linking trace amine receptors to affective disorders. (pnas.org)
  • 260-4481) ABSTRACT OF THE DISCLOSURE Tris(dimethylsilyl)amine, a useful crosslinker, is disclosed. (google.com)
  • This invention relates to tris(dimethylsilyl)amine and to a method of preparing same. (google.com)
  • An object of this invention is to prepare tris(dimethylsilyl) amine. (google.com)
  • Another object is to provide a convenient method for preparing tris(dimethylsilyl)amine. (google.com)
  • An inert organic solvent can be used in the preparation of tris(dimethylsilyl)amine but it is not required and preferably no solvent is used. (google.com)
  • One preparation of tris(dimethylsilyl)amine is the addition of the dimethylmonochlorosilane to the bis(dimethylsilyl)arnine solution which can be accomplished in any desired manner. (google.com)
  • Amines possess a characteristic ammonia smell, liquid amines have a distinctive "fishy" smell. (wikipedia.org)
  • The bis(dimethylsilyl)amine and the bis(triorganosilyl) amine can be prepared by known methods, such as sparging an organic solvent solution of dimethylmonochlorosilane or triorganomonochlorosilane with ammonia. (google.com)
  • Bromine When halogenoalkane is added to ammonia, an amine compound is produced 2. (prezi.com)
  • 260-465D 2 Claims ABSTRACT OF THE DISCLOSURE Hair coloring polymers having anhydride or acid halide groups, which have reacted with dyes having extra nuclear amine and/or hydroxyl groups. (google.com)
  • While many methods are now available for synthesizing amines containing aryl groups, the synthesis of amines containing alkyl groups still pose a challenge. (eurekalert.org)
  • Although metal-catalyzed cross coupling reaction has completely revolutionized the synthesis of aryl amines, it can hardly be used to synthesize alkyl amines," says Xile Hu. (eurekalert.org)
  • The work provides a new and efficient approach for the synthesis of alkyl amines, which has potential applications in the pharmaceutical and fine chemical industries. (eurekalert.org)
  • The protection of amines by N-formylation reaction is one of the most important and extensively used transformations in organic synthesis [1]. (thefreedictionary.com)
  • Small aliphatic amines display significant solubility in many solvents , whereas those with large substituents are lipophilic. (wikipedia.org)
  • Amines, polyethylenepoly-, triethylenetetramine. (europa.eu)
  • There are some carbon frameworks that are going to be a lot easier to get to via this route than by any others, and a lot of diversity than can come in via amine-forming reactions between a variety of partners. (sciencemag.org)
  • Drugs and Medication a) Chlorpheniramine inhibits immune response to relieve allergies from colds, itchy skin, insect bites, etc. b) Ephedrine and Pseudoephedrine amine drugs that are used for allergies involving respiration (decongestants) c)Chlorpromazine a tranquilizing drug used to relieve anxiety and sometimes mental disorders Chemical Properties and Reactions 1. (prezi.com)
  • Heterogeneous reactions of amines have been recently shown to play an important role in the formation and transformation of atmospheric aerosols. (rsc.org)
  • The atmospheric implications of the multiphase reactions of amines, including the potential impact on direct and indirect climate forcing of aerosols, and future research directions are discussed. (rsc.org)
  • amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines). (wikipedia.org)
  • Basicity Amines are bases because they have an electron pair that accepts protons The lone pairs on the nitrogen atom gives amines basic properties 2. (prezi.com)
  • Amines are molecules that contain a basic nitrogen atom. (eurekalert.org)
  • In chemistry, primene amines are mixtures of long-chain branched primary amines. (wikipedia.org)
  • Primene amines are used as used in solvent extractions. (wikipedia.org)
  • The effect of natural molecules, such as amines, on pDC regulation is not yet characterized. (nature.com)
  • Natural amines are small positively charged molecules that have an essential function in various cellular functions. (nature.com)
  • The lone electron pair is represented in this article by a two dots above or next to the N. The water solubility of simple amines is enhanced by hydrogen bonding involving these lone electron pairs. (wikipedia.org)
  • Alkyl Amines Chemicals Compliances - Submission In Compliance With Regulation 40 (9) Of The SEBI (Listing Obligations And Disclosure Requiremen. (indiatimes.com)
  • Alkyl Amines Chemicals Compliances-Certificate under Reg. (indiatimes.com)
  • With reference to significant movement in price, in order to ensure that investors have latest relevant information about the company and to inform the market so that the interest of the investors is safeguarded, Alkyl Amines Chemicals Ltd has submitted to BSE a copy of Clarification is enclosed. (indiatimes.com)
  • Alkyl Amines Chemicals Ltd has submitted to BSE the Shareholding Pattern for the Period Ended March 31, 2020. (indiatimes.com)
  • Alkyl Amines Chemicals Compliances-Reg. (indiatimes.com)
  • Amines are versatile chemicals which are used across a wide range of industries and applications including agrochemicals , personal care, cleaning products, petroleum & gas treatment, water treatment, pharmaceutical, textile, plus many others. (prnewswire.co.uk)
  • This report is essential reading for you or anyone in the chemicals sector with an interest in amines. (prnewswire.co.uk)
  • Quarterly Results of Alkyl Amines Chemicals (in Rs. (moneycontrol.com)
  • As the world's only large-scale converter of acrylonitrile to adiponitrile, Ascend Specialty Chemicals Division is uniquely positioned for the production of dozens of amines , acids, esters and intermediates used in a variety of end applications. (thefreedictionary.com)
  • When it does, it leaves behind free radicals on the two carbons that used to have the amine bonds, and those (doubtless shocked by this weird turn of events) gladly embrace each other to form the new C-C bond. (sciencemag.org)
  • That means a lot, because making amines is relatively easy, while making C-C bonds is relatively hard. (sciencemag.org)
  • Preparing amines from halogenoalkanes Halogenoalkanes are alkane groups containing one or more halogens ex. (prezi.com)
  • Biogenic amine transporters: regulation in flux. (nih.gov)
  • Recognition that transmitters, antagonists and second messengers can modify the intrinsic activity, surface expression or protein levels of amine transporters raises new questions about the fundamental nature of drug actions in vivo. (nih.gov)
  • The reaction rate constants of the distinct charged particles, in which catechol(amine)s can appear, are proved to be independent of pH. (springer.com)
  • Mohamed Amine Khamsi (born 1959 in Morocco ) is an American /Moroccan mathematician . (wikipedia.org)
  • The international Organisation for Economoic Co-operation and Development reported that amine oxides are not genotoxic. (ewg.org)
  • The reduction of the nitrostyrene/P2NP to the corresponding amines is not complete due to an increasing competing hydrogen evolution at the cathode with the progress of the electrolysis. (erowid.org)