Furans. Medical search

Compounds with a 5-membered ring of four carbons and an oxygen. They are aromatic heterocycles. The reduced form is tetrahydrofuran.

Compounds that contain a BENZENE ring fused to a furan ring.

Chlorinated hydrocarbons containing heteroatoms that are present as contaminants of herbicides. Dioxins are carcinogenic, teratogenic, and mutagenic. They have been banned from use by the FDA.

Synthetic organic reactions that use reactions between unsaturated molecules to form cyclical products.

Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)

A group of compounds that are derivatives of methoxybenzene and contain the general formula R-C7H7O.

Organic compounds containing a carbonyl group in the form -CHO.

Amidines substituted with a benzene group. Benzamidine and its derivatives are known as peptidase inhibitors.

Industrial products consisting of a mixture of chlorinated biphenyl congeners and isomers. These compounds are highly lipophilic and tend to accumulate in fat stores of animals. Many of these compounds are considered toxic and potential environmental pollutants.

Derivatives of benzene in which one or more hydrogen atoms on the benzene ring are replaced by bromine atoms.

Rhodium. A hard and rare metal of the platinum group, atomic number 45, atomic weight 102.905, symbol Rh. (Dorland, 28th ed)

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)

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.

A group of DITERPENES cyclized into 2-rings with a side-chain.

A benign tumor of the intrahepatic bile ducts.

Hydrocarbons with at least one triple bond in the linear portion, of the general formula Cn-H2n-2.

A chemical by-product that results from burning or incinerating chlorinated industrial chemicals and other hydrocarbons. This compound is considered an environmental toxin, and may pose reproductive, as well as, other health risks for animals and humans.

A course of action or principle adopted or proposed by a government, party, business, or individual that concerns human interactions with nature and natural resources.

Contamination of the air, bodies of water, or land with substances that are harmful to human health and the environment.

The external elements and conditions which surround, influence, and affect the life and development of an organism or population.

An agency in the Executive Branch of the Federal Government. It was created as an independent regulatory agency responsible for the implementation of federal laws designed to protect the environment. Its mission is to protect human health and the ENVIRONMENT.

The protection, preservation, restoration, and rational use of all resources in the total environment.

The science of controlling or modifying those conditions, influences, or forces surrounding man which relate to promoting, establishing, and maintaining health.

A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

High temperature destruction of waste by burning with subsequent reduction to ashes or conversion to an inert mass.

The study, utilization, and manipulation of those microorganisms capable of economically producing desirable substances or changes in substances, and the control of undesirable microorganisms.

Substances or energies, for example heat or light, which when introduced into the air, water, or land threaten life or health of individuals or ECOSYSTEMS.

Hydrocarbon-rich byproducts from the non-fossilized BIOMASS that are combusted to generate energy as opposed to fossilized hydrocarbon deposits (FOSSIL FUELS).

The attitude of a significant portion of a population toward any given proposition, based upon a measurable amount of factual evidence, and involving some degree of reflection, analysis, and reasoning.

Branch of medicine concerned with the prevention and control of disease and disability, and the promotion of physical and mental health of the population on the international, national, state, or municipal level.

The relationships of groups of organisms as reflected by their genetic makeup.

Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.

Interacting DNA-encoded regulatory subsystems in the GENOME that coordinate input from activator and repressor TRANSCRIPTION FACTORS during development, cell differentiation, or in response to environmental cues. The networks function to ultimately specify expression of particular sets of GENES for specific conditions, times, or locations.

A colorless liquid used as a solvent and an antiseptic. It is one of the ketone bodies produced during ketoacidosis.

Widely distributed enzymes that carry out oxidation-reduction reactions in which one atom of the oxygen molecule is incorporated into the organic substrate; the other oxygen atom is reduced and combined with hydrogen ions to form water. They are also known as monooxygenases or hydroxylases. These reactions require two substrates as reductants for each of the two oxygen atoms. There are different classes of monooxygenases depending on the type of hydrogen-providing cosubstrate (COENZYMES) required in the mixed-function oxidation.

4-carbon straight chain aliphatic hydrocarbons substituted with two hydroxyl groups. The hydroxyl groups cannot be on the same carbon atom.

Oxidases that specifically introduce DIOXYGEN-derived oxygen atoms into a variety of organic molecules.

A purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is an intermediate in the degradation of adenosine monophosphate to uric acid, being formed by oxidation of hypoxanthine. The methylated xanthine compounds caffeine, theobromine, and theophylline and their derivatives are used in medicine for their bronchodilator effects. (Dorland, 28th ed)

Enzymes of the transferase class that catalyze the transfer of a pentose group from one compound to another.

A parasitic hemoflagellate of the subgenus Leishmania leishmania that infects man and animals and causes visceral leishmaniasis (LEISHMANIASIS, VISCERAL). The sandfly genera Phlebotomus and Lutzomyia are the vectors.

The presence of an infectious agent on instruments, prostheses, or other inanimate articles.

The presence of organisms, or any foreign material that makes a drug preparation impure.

Common name for a number of different species of fish in the family Cyprinidae. This includes, among others, the common carp, crucian carp, grass carp, and silver carp.

A family of enveloped, linear, double-stranded DNA viruses infecting a wide variety of animals. Subfamilies, based on biological characteristics, include: ALPHAHERPESVIRINAE; BETAHERPESVIRINAE; and GAMMAHERPESVIRINAE.

Diseases of freshwater, marine, hatchery or aquarium fish. This term includes diseases of both teleosts (true fish) and elasmobranchs (sharks, rays and skates).

An unassigned genus in the family HERPESVIRIDAE, comprising one species Ictalurid herpesvirus 1 (Channel Catfish Virus).

Virus diseases caused by the HERPESVIRIDAE.

Development of muscarinic analgesics derived from epibatidine: role of the M4 receptor subtype. (1/1563)

Epibatidine, a neurotoxin isolated from the skin of Epipedobates tricolor, is an efficacious antinociceptive agent with a potency 200 times that of morphine. The toxicity of epibatidine, because of its nonspecificity for both peripheral and central nicotinic receptors, precludes its development as an analgesic. During the synthesis of epibatidine analogs we developed potent antinociceptive agents, typified by CMI-936 and CMI-1145, whose antinociception, unlike that of epibatidine, is mediated via muscarinic receptors. Subsequently, we used specific muscarinic toxins and antagonists to delineate the muscarinic receptor subtype involved in the antinociception evoked by these agents. Thus, the antinociception produced by CMI-936 and CMI-1145 is inhibited substantially by 1) intrathecal injection of the specific muscarinic M4 toxin, muscarinic toxin-3; 2) intrathecally administered pertussis toxin, which inhibits the G proteins coupled to M2 and M4 receptors; and 3) s.c. injection of the M2/M4 muscarinic antagonist himbacine. These results demonstrate that the antinociception elicited by these epibatidine analogs is mediated via muscarinic M4 receptors located in the spinal cord. Compounds that specifically target the M4 receptor therefore may be of substantial value as alternative analgesics to the opiates. (+info)

A comparison of an A1 adenosine receptor agonist (CVT-510) with diltiazem for slowing of AV nodal conduction in guinea-pig. (2/1563)

1. The purpose of this study was to compare the pharmacological properties (i.e. the AV nodal depressant, vasodilator, and inotropic effects) of two AV nodal blocking agents belonging to different drug classes; a novel A1 adenosine receptor (A1 receptor) agonist, N-(3(R)-tetrahydrofuranyl)-6-aminopurine riboside (CVT-510), and the prototypical calcium channel blocker diltiazem. 2. In the atrial-paced isolated heart, CVT-510 was approximately 5 fold more potent to prolong the stimulus-to-His bundle (S-H interval), a measure of slowing AV nodal conduction (EC50 = 41 nM) than to increase coronary conductance (EC50 = 200 nM). At concentrations of CVT-510 (40 nM) and diltiazem (1 microM) that caused equal prolongation of S-H interval (approximately 10 ms), diltiazem, but not CVT-510, significantly reduced left ventricular developed pressure (LVP) and markedly increased coronary conductance. CVT-510 shortened atrial (EC50 = 73 nM) but not the ventricular monophasic action potentials (MAP). 3. In atrial-paced anaesthetized guinea-pigs, intravenous infusions of CVT-510 and diltiazem caused nearly equal prolongations of P-R interval. However, diltiazem, but not CVT-510, significantly reduced mean arterial blood pressure. 4. Both CVT-510 and diltiazem prolonged S-H interval, i.e., slowed AV nodal conduction. However, the A1 receptor-selective agonist CVT-510 did so without causing the negative inotropic, vasodilator, and hypotensive effects associated with diltiazem. Because CVT-510 did not affect the ventricular action potential, it is unlikely that this agonist will have a proarrythmic action in ventricular myocardium. (+info)

Relationships between environmental organochlorine contaminant residues, plasma corticosterone concentrations, and intermediary metabolic enzyme activities in Great Lakes herring gull embryos. (3/1563)

Experiments were conducted to survey and detect differences in plasma corticosterone concentrations and intermediary metabolic enzyme activities in herring gull (Larus argentatus) embryos environmentally exposed to organochlorine contaminants in ovo. Unincubated fertile herring gull eggs were collected from an Atlantic coast control site and various Great Lakes sites in 1997 and artificially incubated in the laboratory. Liver and/or kidney tissues from approximately half of the late-stage embryos were analyzed for the activities of various intermediary metabolic enzymes known to be regulated, at least in part, by corticosteroids. Basal plasma corticosterone concentrations were determined for the remaining embryos. Yolk sacs were collected from each embryo and a subset was analyzed for organochlorine contaminants. Regression analysis of individual yolk sac organochlorine residue concentrations, or 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQs), with individual basal plasma corticosterone concentrations indicated statistically significant inverse relationships for polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDDs/PCDFs), total polychlorinated biphenyls (PCBs), non-ortho PCBs, and TEQs. Similarly, inverse relationships were observed for the activities of two intermediary metabolic enzymes (phosphoenolpyruvate carboxykinase and malic enzyme) when regressed against PCDDs/PCDFs. Overall, these data suggest that current levels of organochlorine contamination may be affecting the hypothalamo-pituitary-adrenal axis and associated intermediary metabolic pathways in environmentally exposed herring gull embryos in the Great Lakes. (+info)

Oxidative bioactivation of the lactol prodrug of a lactone cyclooxygenase-2 inhibitor. (4/1563)

The lactol derivative of a lactone cyclooxygenase-2 inhibitor (DFU) was evaluated in vivo and in vitro for its potential suitability as a prodrug. DFU-lactol was found to be 10 to 20 times more soluble than DFU in a variety of aqueous vehicles. After administration of DFU-lactol at 20 mg kg-1 p.o. in rats, a Cmax of 7.5 microM DFU was reached in the plasma. After oral administration, the ED50s of DFU-lactol in the carrageenan-induced paw edema and lipopolysaccharide-induced pyresis assays in rats are comparable with the ED50s observed when dosing with DFU. Incubations of DFU-lactol with rat and human hepatocytes demonstrated that the oxidation of DFU-lactol can be mediated by liver enzymes and that a competing pathway is direct glucuronidation of the DFU-lactol hydroxyl group. Assays with subcellular fractions from rat liver indicated that most of the oxidation of DFU-lactol occurs in the cytosolic fraction and requires NAD(P)+. Human liver cytosol can also support the oxidation of DFU-lactol to DFU when NAD(P)+ is added to the incubations. Fractionation of human liver cytosolic proteins showed that at least three enzymes are capable of efficiently effecting the oxidation of DFU-lactol to DFU. Incubations with commercially available dehydrogenases suggest that alcohol and hydroxysteroid dehydrogenases are involved in this oxidative process. These data together suggest that lactols may represent useful prodrugs for lactone-containing drugs. (+info)

Evolution of plant defense mechanisms. Relationships of phenylcoumaran benzylic ether reductases to pinoresinol-lariciresinol and isoflavone reductases. (5/1563)

Pinoresinol-lariciresinol and isoflavone reductase classes are phylogenetically related, as is a third, the so-called "isoflavone reductase homologs." This study establishes the first known catalytic function for the latter, as being able to engender the NADPH-dependent reduction of phenylcoumaran benzylic ethers. Accordingly, all three reductase classes are involved in the biosynthesis of important and related phenylpropanoid-derived plant defense compounds. In this investigation, the phenylcoumaran benzylic ether reductase from the gymnosperm, Pinus taeda, was cloned, with the recombinant protein heterologously expressed in Escherichia coli. The purified enzyme reduces the benzylic ether functionalities of both dehydrodiconiferyl alcohol and dihydrodehydrodiconiferyl alcohol, with a higher affinity for the former, as measured by apparent Km and Vmax values and observed kinetic 3H-isotope effects. It abstracts the 4R-hydride of the required NADPH cofactor in a manner analogous to that of the pinoresinol-lariciresinol reductases and isoflavone reductases. A similar catalytic function was observed for the corresponding recombinant reductase whose gene was cloned from the angiosperm, Populus trichocarpa. Interestingly, both pinoresinol-lariciresinol reductases and isoflavone reductases catalyze enantiospecific conversions, whereas the phenylcoumaran benzylic ether reductase only shows regiospecific discrimination. A possible evolutionary relationship among the three reductase classes is proposed, based on the supposition that phenylcoumaran benzylic ether reductases represent the progenitors of pinoresinol-lariciresinol and isoflavone reductases. (+info)

Evidence that halogenated furanones from Delisea pulchra inhibit acylated homoserine lactone (AHL)-mediated gene expression by displacing the AHL signal from its receptor protein. (6/1563)

Acylated homoserine lactone (AHL)-mediated gene expression controls phenotypes involved in colonization, often specifically of higher organisms, in both marine and terrestrial environments. The marine red alga Delisea pulchra produces halogenated furanones which resemble AHLs structurally and show inhibitory activity at ecologically realistic concentrations in AHL bioassays. Evidence is presented that halogenated furanones displace tritiated OHHL [N-3-(oxohexanoyl)-L-homoserine lactone] from Escherichia coli cells overproducing LuxR with potencies corresponding to their respective inhibitory activities in an AHL-regulated bioluminescence assay, indicating that this is the mechanism by which furanones inhibit AHL-dependent phenotypes. Alternative mechanisms for this phenomenon are also addressed. General metabolic disruption was assessed with two-dimensional PAGE, revealing limited non-AHL-related effects. A direct chemical interaction between the algal compounds and AHLs, as monitored by 1H NMR spectroscopy, was shown not to occur in vitro. These results support the contention that furanones, at the concentrations produced by the alga, can control bacterial colonization of surfaces by specifically interfering with AHL-mediated gene expression at the level of the LuxR protein. (+info)

NADH-quinone oxidoreductase: PSST subunit couples electron transfer from iron-sulfur cluster N2 to quinone. (7/1563)

The proton-translocating NADH-quinone oxidoreductase (EC 1.6.99.3) is the largest and least understood enzyme complex of the respiratory chain. The mammalian mitochondrial enzyme (also called complex I) contains more than 40 subunits, whereas its structurally simpler bacterial counterpart (NDH-1) in Paracoccus denitrificans and Thermus thermophilus HB-8 consists of 14 subunits. A major unsolved question is the location and mechanism of the terminal electron transfer step from iron-sulfur cluster N2 to quinone. Potent inhibitors acting at this key region are candidate photoaffinity probes to dissect NADH-quinone oxidoreductases. Complex I and NDH-1 are very sensitive to inhibition by a variety of structurally diverse toxicants, including rotenone, piericidin A, bullatacin, and pyridaben. We designed (trifluoromethyl)diazirinyl[3H]pyridaben ([3H]TDP) as our photoaffinity ligand because it combines outstanding inhibitor potency, a suitable photoreactive group, and tritium at high specific activity. Photoaffinity labeling of mitochondrial electron transport particles was specific and saturable. Isolation, protein sequencing, and immunoprecipitation identified the high-affinity specifically labeled 23-kDa subunit as PSST of complex I. Immunoprecipitation of labeled membranes of P. denitrificans and T. thermophilus established photoaffinity labeling of the equivalent bacterial NQO6. Competitive binding and enzyme inhibition studies showed that photoaffinity labeling of the specific high-affinity binding site of PSST is exceptionally sensitive to each of the high-potency inhibitors mentioned above. These findings establish that the homologous PSST of mitochondria and NQO6 of bacteria have a conserved inhibitor-binding site and that this subunit plays a key role in electron transfer by functionally coupling iron-sulfur cluster N2 to quinone. (+info)

Role of metabolic activation in the pathogenesis of chemically induced pulmonary disease: mechanism of action of the lung-toxic furan, 4-ipomeanol. (8/1563)

Many xenobiotics produce hepatic injury due to their metabolism in the liver to highly reactive electrophile intermediates which form covalent conjugates with nucleophilic cellular constituents. This presentation describes studies indicating that the production of chemically reactive metabolites by pulmonary metabolism of xenobiotics can also play a fundamental role in the pathogenesis of chemically induced lung disease. (+info)

Catalytic conversions of various furan derivatives[edit]. The third class includes reactions describing the synthesis of FDCA ... The potential applications of furan-based building blocks for polymer applications has been extensively reviewed by Gandini.[20 ... The second class of synthesis routes include the oxidation reactions of various 2,5-disubstituted furans utilizing a variety of ... Furan-2,5-dicarboxylic acid (FDCA) has been suggested as an important renewable building block because it can substitute for ...

https://en.wikipedia.org/wiki/2,5-Furandicarboxylic_acid

Furan, Amy. "Dream Job: Snowplow Driver". salary.com. Archived from the original on 1 May 2007. Retrieved 23 April 2007.. ...

https://en.wikipedia.org/wiki/Gritter

Toxic equivalence factors (TEFs) exist for seven congeners of dioxins, ten furans and twelve PCBs. The reference congener is ... Polychlorinated dibenzofurans (PCDFs), or furans. PCDFs are derivatives of dibenzofuran. There are 135 isomers, ten have dioxin ... in case of dioxins and furans, chlorine substitutes in positions 2,3,7, and 8.[2] Each additional non-lateral chlorine ... "Apparent half-lives of dioxins, furans, and polychlorinated biphenyls as a function of age, body fat, smoking status, and ...

https://en.wikipedia.org/wiki/Dioxin_compound

Maga, Joseph A.; Katz, Ira (May 1979). "Furans in foods". C R C Critical Reviews in Food Science and Nutrition. 11 (4): 355-400 ...

https://en.wikipedia.org/wiki/Tetrahydrofurfuryl_acetate

1832: Dobereiner produces furfural (a furan) by treating starch with sulfuric acid. 1834: Runge obtains pyrrole ("fiery oil") ... Included are pyridine, thiophene, pyrrole, and furan. Another large class of heterocycles are fused to benzene rings, which for ... "Design, synthesis of novel furan appended benzothiazepine derivatives and in vitro biological evaluation as potent VRV-PL-8a ... pyridine, thiophene, pyrrole, and furan are quinoline, benzothiophene, indole, and benzofuran, respectively. Fusion of two ...

https://en.wikipedia.org/wiki/Heterocyclic_ring

They consist of coumarin annulated with furan. It can also be injected and used topically. Methoxsalen is extracted from Ammi ...

https://en.wikipedia.org/wiki/Methoxsalen

Furan is thus derivable from renewable resources. Applications[edit]. Polymerization[edit]. In the presence of strong acids, ... THF can also be synthesized by catalytic hydrogenation of furan.[8][9] Certain sugars can be converted to THF,[citation needed] ...

https://en.wikipedia.org/wiki/Tetrahydrofuran

In furan, the oxygen atom is sp2 hybridized. One lone pair is in the π system and the other in the plane of the ring (analogous ... This can lessen the ring's aromaticity, and thus (as in the case of furan) increase its reactivity. Other examples include ... to the C-H bond in the other positions). There are 6 π-electrons, so furan is aromatic. Aromatic molecules typically display ...

https://en.wikipedia.org/wiki/Aromaticity

2. Dien-Synthesen des Furans.)". Annalen. 490 (1): 243-257. doi:10.1002/jlac.19314900110. Van Berkel, Sander S.; Dirks, A. (Ton ... 3-triazoles and furans. The intermediate triazolines avoid detection because of a very strong thermodynamic drive to collapse ... readily obtainable by a Diels-Alder cycloaddition between furans and acetylenedicarboxylates such as DMAD. OND-2,3- ...

https://en.wikipedia.org/wiki/Oxanorbornadiene

The asymmetric hydrogenation of furans and benzofurans has so far proven challenging. Some Ru-NHC complex catalyze asymmetric ... The asymmetric hydrogenation of furans and benzofurans As is the case with oxygen-containing heterocycles, the asymmetric ... Wysocki, Jędrzej; Ortega, Nuria; Glorius, Frank (2014). "Asymmetric Hydrogenation of Disubstituted Furans". Angewandte Chemie ... hydrogenations of benzofurans and furans. with high levels of enantioinduction. ...

https://en.wikipedia.org/wiki/Asymmetric_hydrogenation

The aromatic ethers include furans. Acetals (α-alkoxy ethers R-CH(-OR)-O-R) are another class of ethers with characteristic ...

https://en.wikipedia.org/wiki/Ether

4-(4-methylsulfonylphenyl)-3-phenyl-5H-furan-2-one. CAS Number. *162011-90-7 Y ...

https://en.wikipedia.org/wiki/Rofecoxib

Furan Gachkun , Gachlu , Gandam Guh , Garakan , Garmab , Gav Khaneh , Gavar , Gavi Cheshmeh , Gavjellu , Gazavand , Gazeran , ...

https://en.wikipedia.org/wiki/List_of_cities,_towns_and_villages_in_Markazi_Province

2017). "Furan". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History. ...

https://en.wikipedia.org/wiki/Fur_languages

... is used to make other furan derivative, such as furoic acid, via oxidation, and furan itself via palladium catalyzed ... Chemically, furfural is an aldehyde of furan. It is a colorless oily liquid with the odor of almonds, which quickly darkens ... Hydrogenation of furfural provides furfuryl alcohol (FA), which is a used to produce furan resin prepolymers exploited in ... "The Furans: Fifteen Years of Progress". Industrial & Engineering Chemistry. 28 (7): 755-759. doi:10.1021/ie50319a002. ISSN 0019 ...

https://en.wikipedia.org/wiki/Furfural

Furan, Amy (2006). "Dream Jobs: Zamboni Driver". Archived from the original on July 5, 2006. Retrieved April 3, 2007 - via ...

https://en.wikipedia.org/wiki/Al_Sobotka

2-METHYL-FURAN". Retrieved 2008-08-26. "2-methyl furan". The Good Scents Company. Retrieved 2008-08-26. L. W. Burnette, et al ...

https://en.wikipedia.org/wiki/2-Methylfuran

... is a natural terpenoid that consists of a furan ring with a six-carbon side chain containing a ketone functional ... 64: 1130-6. Perilla: Botany, Uses and Genetic Resources Teruo Matsuura (1957). "Natural furan derivatives. I. The synthesis of ...

https://en.wikipedia.org/wiki/Perilla_ketone

US patent US4128658, "Aminoalkyl furan derivatives", 1978 *^ Laurence Brunton; John Lazo; Keith Parker (August 2005). Goodman ... Glaxo refined the model further by replacing the imidazole ring of cimetidine with a furan ring with a nitrogen-containing ... N-(2-[(5-[(dimethylamino)methyl]furan-2-yl)methylthio]ethyl)-N'-methyl-2-nitroethene-1,1-diamine ...

https://en.wikipedia.org/wiki/Ranitidine

These noxious fumes include dioxins and furans. Bonfire refuse can be disposed of quickly into drainage ditches or waterways ...

https://en.wikipedia.org/wiki/Electronic_waste

Wilson, Christopher L. (December 1947). "Reactions of Furan Compounds. VII. Thermal Interconversion of 2,3-Dihydrofuran and ...

https://en.wikipedia.org/wiki/2,3-Dihydrofuran

Wilson, C. L.; Borchert, A. E. (1947). "Reactions of Furan Compounds. VII. Thermal Interconversionof 2,3-Dihydrofuran and ...

https://en.wikipedia.org/wiki/Vinylcyclopropane_rearrangement

Ramonczai, J.; L. Vargha (June 1950). "Studies of furan compounds. III. A new synthesis of furyl ketones". Journal of the ...

https://en.wikipedia.org/wiki/Büchner–Curtius–Schlotterbeck_reaction

Furan, an oxygen analog. Thiophene, a sulfur analog. Simple aromatic rings Varsol, a petroleum distillate with a boiling range ...

https://en.wikipedia.org/wiki/Arsole

135-234, doi:10.1016/S0065-2725(08)60141-5 W. Friedrichsen (1999), "Recent advances in the chemistry of benzo[c]furans and ... W. Friedrichsen (1980), "Benzo[c]furans", Adv. Heterocycl. Chem. 26: pp. ...

https://en.wikipedia.org/wiki/1,3-Diphenylisobenzofuran

"Palladium-catalyzed asymmetric hydrogenation of furan carboxylic acids". Journal of Catalysis. 219 (1): 52-58. doi:10.1016/ ... "Enantioselective homogeneous hydrogenation of monosubstituted pyridines and furans". Monatshefte fuer Chemie. 131 (12): 1335- ...

https://en.wikipedia.org/wiki/Tetrahydro-2-furoic_acid

Besedilo se sme prosto uporabljati v skladu z dovoljenjem Creative Commons Priznanje avtorstva-Deljenje pod enakimi pogoji 3.0; uveljavljajo se lahko dodatni pogoji. Za podrobnosti glej Pogoje uporabe ...

https://sl.wikipedia.org/wiki/Kategorija:Heterociklične_spojine

5H-furan-2-on. Drugi nazivi furan-2-on, γ-krotonolakton, β-anđelika lakton, butenolid ...

https://sr.wikipedia.org/wiki/2-furanon

These are the furan ring, the ketone group and the alcohol group. The furan ring is aromatic according to Hückel's rule, so the ... It consists of a furan ring, which is substituted at the third carbon of the furan ring with a pentanone containing a hydroxyl ... Furan is heterocyclic, which means that it is cyclic, but one or more of the ring atoms is not a carbon atom. In the case of ... A furan ring is a five-membered aromatic ring consisting of one oxygen atom and four carbon atoms; a pentanone is a ketone ...

https://en.wikipedia.org/wiki/4-Ipomeanol

Furan Furfural Pyrone Thiopyran Masamune, S.; Castellucci, N. T. (1962). "γ-Pyran". Journal of the American Chemical Society. ...

https://en.wikipedia.org/wiki/Pyran

SGS dioxin and furan analysis can accurately measure trace quantities to improve your site safety. Find out more. ... Toxic dioxins and furans can accumulate through industrial processes. ... Environment Dioxins and Furans. Dioxins and furans are carcinogenic and so are some of the most regulated environmental ... Home › Environment › Air, Noise, Odor and Vibration › Laboratory Analysis › Specialty Analyses › Dioxins and Furans ...

https://www.sgs.com/en/environment/air-noise-odor-and-vibration/laboratory-analysis/specialty-analyses/dioxins-and-furans

Toxics Link Dioxins and Furans booklet.pdf. Toxics Link Dioxins and Furans booklet.pdf ... Ongoing review and updating of the Standardized Toolkit for Identification and Quantification of Dioxin and Furan Releases - An ...

http://ipen.org/tags/furans

Get the latest furan contamination news on Environmental XPRT, the worlds largest environmental industry marketplace and ... Keenan is known for his skills in risk assessment of PCBs, dioxins, furans, chromium, and mercury and for the development of ... The sediments are contaminated with high levels of dioxins and furans, chlorobenzenes, metals, and other materials. On June 27 ...

https://www.environmental-expert.com/news/keyword-furan-contamination-104227

Koi Ha Furan ARO HIROSHI 恋は芙蘭 - あろひろし/著 ...

https://www.cdjapan.co.jp/ebooks/d/BTW10000000411221

110-00-9 Furan (furane) testing. Laboratory testing for CAS number 110-00-9. Divinylene oxide;Furfuran;Oxacyclopentadiene;Oxole ... Tetrole;Furane;Furfurane;NCI-C56202;Rcra waste number U124;UN 2389;QO Furan. This chemical is colourless liquid ... Alternate Names: Furan , FURAN. Department: Organics. * Columbia Analytical may or may not test for the presence of Furan ( ... Furan (furane) - CAS # 110-00-9. Information provided on Furan (furane) (110-00-9) is for reference only and is subject to ...

http://www.caslab.com/Furan_furane_CAS_110-00-9/

... words that start with furans, words that end with furans, anagrams of furans, how to spell furans!, Words with Friends, ... Anagrams and words you can make with the letters in furans ( a f n r s u ). Words that end with furans. furans. ... furanosides : furans : furazolidone Words that sound like or rhyme with furans. burans furanes puranas francs franks pyrans ... See what words contain the exact word furans. ... Suffixes of furans. urans rans ans ns Prefixes of furans. furan ...

http://anagramscramble.com/word/furans

Furan 27.5". Hard knuckle mountain riding is Furans forte. Hand welded from 6061 Aluminum, Psynydes specially designed ... The Furan will perform well with 100 mm fork travel as well. A higher travel fork will put the frame integrity at risk. ... The Furan will perform well with 100 mm fork travel as well. A higher travel fork will put the frame integrity at risk. ... Our Furan frame is available to customers as a frame only option. This is a great way to experience the Psynyde Design ...

http://psynydebikes.com/product/furan-27-5/

Psynyde Furan 27.5"-Deore Build. PsynydeFuran27.5Deore Build The Furan is a 650B Trail & Single track Bike which features short ... Psynyde Furan 27.5"-Deore Build. Home / Bicycles / MTB / Psynyde Furan 27.5"-Deore Build. ... Be the first to review "Psynyde Furan 27.5"-Deore Build" Cancel reply. Your email address will not be published. Required ... The 800mm wide bar and 50mm stem combination allows Furan to maneuver over some of the most technical terrain with ease. ...

http://psynydebikes.com/product/psynyde-furan-27-5-deore-build/

Furan is used as a starting point to other speciality chemicals. The name "furan" comes from the Latin furfur, which means bran ... Furan is therefore listed as a possible human carcinogen. BS 4994 - Furan resin as thermoset FRP for chemical process plant ... Many routes exist for the synthesis of substituted furans. Furan is aromatic because one of the lone pairs of electrons on the ... Hydrogenation of furans sequentially affords dihydrofurans and tetrahydrofurans. In the Achmatowicz reaction, furans are ...

https://en.wikipedia.org/wiki/Furan

Furan, the chemical industrial compound Polychlorinated dibenzofurans, an unintentional contaminant byproduct of furans Furan ( ... river) in France Furan, Iran, a village in Markazi Province, Iran Nitrofurantoin, by the trade name Furan. ...

https://en.wikipedia.org/wiki/Furan_(disambiguation)

... and application of furans and benzofurans bearing a fluorine atom and a trifluoromethyl group are reviewed. ... Lyalin VV, Grigorash RV, Alekseeva LA, Yagupolskii LM (1975) Mono(trifluoromethyl)furans and bis(trifluoromethyl)furans. Russ J ... Wilson WS, Warrener RN (1972) A mild retro-[π4S+π2S] cleavage route to furans and fulvenes. J Chem Soc Chem Commun 211-212 ... Palladium-catalyzed alkenylation of fluoro-substituted furans via C-H activation to form tetrasubstituted furans. Tetrahedron ...

https://link.springer.com/chapter/10.1007%2F978-3-319-04346-3_5

furans This website has limited functionality with javascript off. Please make sure javascript is enabled in your browser. ... For references, please go to https://www.eea.europa.eu/help/glossary/eea-glossary/furans or scan the QR code. ...

https://www.eea.europa.eu/help/glossary/eea-glossary/furans

Body burden levels of dioxin, furans, and PCBs among frequent consumers of Great Lakes sport fish. The Great Lakes Consortium. ... Table of laboratory methods panels for Dioxins, Furans, coplanar polychlorinated biphenyls (PCBs). Chemical. Specimen Type. ... Biomonitoring Factsheet: Dioxins, Furans and Dioxin-Like Polychlorinated Biphenyls. National Report on Human Exposure to ... On the isolation of polychlorinated dibenzo-p-dioxins and furans from serum samples using immunoaffinity chromatography prior ...

https://www.cdc.gov/nceh/dls/oatb_capacity_05.html

The purpose of this technical report is to present the IDLH value for furan (CAS® #110-00-9). ... The purpose of this technical report is to present the IDLH value for furan (CAS® #110-00-9). The scientific basis, toxicologic ... Immediately Dangerous to Life or Health (IDLH) Value Profile: Furan. ...

https://www.cdc.gov/niosh/docs/2016-171/default.html

APGC-MS/MS Investigation of a Complex Mixture of Polyhalogenated Dioxins and Furans (PXDD/Fs) Generated in Fire Debris ...

http://www.waters.com/waters/en_GB/Dioxins-and-Furans/nav.htm?cid=134802162&locale=en_GB

Learn More about Furans
furans.html>Synthesis of Furans ... Furan derivatives have been found to be inhibitors of biofilm formation for several bacterial species, as well as possess ... An iodinated lipophilic furan derivative is widely used in the treatment of ventricular and arterial fibrillation. These ... The furan ring system is the basic skeleton of numerous compounds possessing cardiovascular activities. ...

https://www.sigmaaldrich.com/chemistry/chemistry-products.html?TablePage=16267998

EHP is pleased to present the abstracts from the 29th Annual Scientific Conference of the International Society for Environmental Epidemiology (ISEE), held in Sydney, Australia, 24-28 September 2017. The conference was hosted by The University of Sydney and cosponsored by the Woolcock Institute of Medical Research, with the theme "Healthy Places, Healthy People-Where Are the Connections?". ...

https://ehp.niehs.nih.gov/tag/dioxins-and-furans/

The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database ...

https://webbook.nist.gov/cgi/inchi/InChI%3D1S/C13H20O2/c1-2-3-4-5-6-7-9-12

Green J.H.S., Spectroscopic and thermodynamic properties of furan derivatives. I. 2- and 2,5-substituted compounds, Spectrochim ... Energy storage capacity of reversible liquid-phase Diels Alder reaction between maleic anhydride and 2-methyl furan, Am. Inst. ...

https://webbook.nist.gov/cgi/cbook.cgi?Source=1965CAR%2FWES134-135&Units=SI&Mask=B

Other names: 2-Propylfuran; Furan, «alpha»-propyl-; 2-n-Propylfuran * Permanent link for this species. Use this link for ...

https://webbook.nist.gov/cgi/cbook.cgi?ID=C4229918&Units=CAL&Mask=FFFF&Type=LINEAR-RI-NON-POLAR-CUSTOM

The name "furan" comes from the Latin furfur, which means bran.[5] The first furan derivative to be described was 2-furoic acid ... Synthesis of furansEdit. The Feist-Benary synthesis is a classic way to synthesize furans, although many syntheses have been ... For other uses, see Furan (disambiguation).. Furan is a heterocyclic organic compound, consisting of a five-membered aromatic ... Hydrogenation of furans sequentially affords dihydrofurans and tetrahydrofurans.. *In the Achmatowicz reaction, furans are ...

https://en.m.wikipedia.org/wiki/Furan

Dioxins, Furans, & Coplanar PCBs (L28DFP_C) Data File: L28DFP_C.xpt First Published: April 2008. Last Revised: NA ... Together with the polychlorinated dioxins and furans, these two special classes of PCBs are often referred to as "dioxin-like" ...

https://wwwn.cdc.gov/Nchs/Nhanes/2003-2004/L28DFP_C.htm

2005) Furan fatty acids: Occurrence, synthesis, and reactions. Are furan fatty acids responsible for the cardioprotective ... Furan fatty acids. Rachelle A. S. Lemke, Amelia C. Peterson, Eva C. Ziegelhoffer, Michael S. Westphall, Henrik Tjellström, ... Furan fatty acids. Rachelle A. S. Lemke, Amelia C. Peterson, Eva C. Ziegelhoffer, Michael S. Westphall, Henrik Tjellström, ... 2011) Furan fatty acid as an anti-inflammatory component from the green-lipped mussel Perna canaliculus. Proc Natl Acad Sci USA ...

https://www.pnas.org/content/111/33/E3450

Altogether, our study shows that BVMOs can be employed for the selective oxidation of furans. ... were selected for studying their biocatalytic potential in converting furfural and some other furans. While BVMOs are usually ... can be used as biocatalysts for the selective oxidation of several furans, including 5-(hydroxymethyl) furfural (HMF) and ... Various furans are considered as valuable platform chemicals as they can be derived from plant biomass. Yet, for their ...

http://www.mdpi.com/2073-4344/7/6/179

Find furan sampling articles on Environmental XPRT, the worlds largest environmental industry marketplace and information ... furan sampling Articles. Related terms for "furan sampling ": furan articles , furan sampling system articles , long-term furan ... Dioxins and Furans on the Equity-5 Dioxins and furans are byproducts of several different industrial processes, including ... Paper fibers as a carbon source for the de novo formation of polychlorinated dioxins and furans Abstract The formation of ...

https://www.environmental-expert.com/articles/keyword-furan-sampling-66033

P. putida ALS1267 was the most tolerant to furans and tolerated 17 mM furfural or 195 mM furoate before its growth rate was ... Wang, X., Miller, E. N., Yomano, L. P., Shanmugam, K. T., & Ingram, L. O. (2012). Increased furan tolerance in Escherichia coli ... Isolation and Characterization of Bacteria That Use Furans as the Sole Carbon Source. ...

https://link.springer.com/article/10.1007/s12010-015-1859-9

Furans have one or two phenyl rings connected to a furan ring. PCBs have two phenyl rings attached at one point. One or more ... Dioxins, Furans, PCBs (contain phenyl rings of carbon atoms). Dioxins, furans, and polychlorinated biphenyls (PCBs) are a class ... Dioxins and dioxin-like furans have no known commercial or natural use. They are produced primarily during the incineration or ...

https://www.atsdr.cdc.gov/substances/toxchemicallisting.asp?sysid=29

Change in dioxin and furan emissions This website has limited functionality with javascript off. Please make sure javascript is ... 20environment/change-in-dioxin-furan-emissions or scan the QR code. ...

https://www.eea.europa.eu/data-and-maps/daviz/eionet/sandbox/LOT2%20-%20Daviz%20testing%20environment/change-in-dioxin-furan-emissions

https://wwwn.cdc.gov/TSP/substances/ToxChemicalListing.aspx?toxid=29

Consumer exposure to furan and methylfurans in food could lead to possible long-term liver damage. The most exposed group of ... Reducing furan exposure. Furans form from a variety of substances naturally present in food, including vitamin C, carbohydrates ... Potential health risks linked to furan. EFSA carried out this assessment following its monitoring of furan levels in food and ... The level of furan in toast increases with toasting time and with the degree of browning, albeit toast is a less important ...

https://www.efsa.europa.eu/en/press/news/171025

... "furan levels alone do not equate to furan exposure; calculating exposure requires consideration of both furan levels, and the ... "Exploratory Data on Furan in Food: Individual Food Products" See also "Questions and Answers on the Occurrence of Furan in Food ... Furans can be found in a multitude of heat processed food products- many of which do not contain high fructose corn syrup. To ... Misleading Study on Furans and High Fructose Corn Syrup. FOR IMMEDIATE RELEASE. May 14, 2010 ...

https://corn.org/furan-study-misleading/

Ime furan izhaja iz latinske besede furfur, ki pomeni otrobe.[1] Prvi opis derivata furana je bila 2-furojska kislina, ki jo je ... Furan sam je kot prvi pripravil Heinrich Limpricht leta 1870, čeprav mu je rekel tetrafenol.[2][3] ... Furan je heterociklična organska spojina, ki jo sestavlja petčlenski aromatski obroč s štirimi atomi ogljika in enim atomom ... Furan je brezbarvna, vnetljiva, izjemno hlapljiva tekočina z vreliščem blizu sobne temperature. Je strupen, morda tudi ...

https://sl.wikipedia.org/wiki/Furan

... successfully completed an engine test to demonstrate the potential of its furan-based biofuels, or ... Avantium Engine-Tests Furan-Based Biofuel 26 October 2007 Avantium derives its Furanics fuels from the intermediate ... Well, the furans might be good fuels. But the real problem here is to get them cheaply on large scale. You get them from ... In furan production, the feedstock can only be sugars (luckily, we have a lot of sugars in any plant material). ...

http://www.greencarcongress.com/2007/10/avantium-engine.html

Dioxins and furans are carcinogenic and so are some of the most regulated environmental contaminants. (sgs.com)
Produced inadvertently by industrial processes such as waste incineration, chemical manufacturing and paper bleaching, dioxins and furans can be found in the air, in water and contaminated soil. (sgs.com)
High-resolution mass spectrometry is the only legally accepted analytical technique for quantifying dioxins and furans. (sgs.com)
The sediments are contaminated with high levels of dioxins and furans, chlorobenzenes, metals, and other materials. (environmental-expert.com)

Call SGS today for a dioxin and furan analysis to ensure your site safety. (sgs.com)
Our dioxin and furan testing can identify where toxic emissions are occurring and help to improve the safety of your operations. (sgs.com)
We also monitor dioxin and furan levels in food and animal feed. (sgs.com)
Fully accredited at local and international level, we are recognized as one of the world's leading and most reliable laboratories for dioxin and furan testing. (sgs.com)

About ranitidinea histamine h2-receptor antagonist, furan derivative, anti-secretory g.i agent,anti ulcer.mechanism of action of ranitidineranitidine is a h2 (histamine) receptor antagonist. (dalilaldwaa.com)

It can also be synthesized by catalytic hydrogenation of furan. (rhythmchemicals.in)

Dioxins and furans are carcinogenic and so are some of the most regulated environmental contaminants. (sgs.com)
Produced inadvertently by industrial processes such as waste incineration, chemical manufacturing and paper bleaching, dioxins and furans can be found in the air, in water and contaminated soil. (sgs.com)
High-resolution mass spectrometry is the only legally accepted analytical technique for quantifying dioxins and furans. (sgs.com)
The process of smashing and burning the plastic casing and cables, to extract the metals, releases dangerous chemicals found within the plastics, such as brominated flame retardants, and creates highly toxic by-product chemicals like brominated and chlorinated dioxins and furans. (ipen.org)
Together with the polychlorinated dioxins and furans, these two special classes of PCBs are often referred to as "dioxin-like" chemicals because they act in the body through a similar mechanism. (cdc.gov)
The sediments are contaminated with high levels of dioxins and furans, chlorobenzenes, metals, and other materials. (environmental-expert.com)
Dioxins and furans are byproducts of several different industrial processes, including incineration and paper bleaching. (environmental-expert.com)
Polychlorinated dibenzo dioxins (PCDDs) and polychlorinated dibenzo furans (PCDFs) are persistent organic pollutants (POPs) banned by the Stockholm Convention and they are therefore monitored worldwide. (environmental-expert.com)
The efficacy of pressurized solvent extraction with BUCHI's new SpeedExtractor was examined for the extraction of dioxins/furans (PCDDs/PCDFs), polybrominated diphenyl ethers (PBDEs), and perfluorinated compounds (PFCs) from different environmental matrices: PCDDs/PCDFs from soil samples, PFCs from soil and sewage sludge, and PBDEs from lake sediments. (environmental-expert.com)
Car-engine air filters (CAFs) have been recently used as inexpensive alternative air sampling media for hydrophobic organic compounds such as polycyclic aromatic hydrocarbons, polychlorinated dibenzo-p-dioxins and furans and also for heavy metals. (environmental-expert.com)
Dioxins, furans, and polychlorinated biphenyls (PCBs) are a class of similar chlorinated aromatic organic compounds. (cdc.gov)
Dioxins and dioxin-like furans have no known commercial or natural use. (cdc.gov)
Please explore our range of standards for dioxins and furans below and get in touch if you have questions about how we can support you in your analytical testing. (lgcstandards.com)
We identify and quantify ultra-trace levels of Dioxins, Furans and Dioxin-like PCB congeners and other persistent organic pollutants (POPS) in liquid, solid, air and biota. (maxxam.ca)
In selecting a 'supplier' for analysis of dioxins and furans and dioxin-like PCB congeners, it is important to realize that services differ from lab to lab in terms of analytical solutions provided, instrumentation used and the expertise of the people involved in the project. (maxxam.ca)
As part of environmental health studies in Escambia and Santa Rosa counties, UWF's CEDB found that blue crabs and oysters collected from western Escambia Bay locations had relatively higher loads (TEQs) of dioxins/furans and dioxin-like PCBs than samples collected from eastern Escambia Bay. (uwf.edu)
Recent findings indicate that mullet and large mouth bass collected from Lower Escambia River contain relatively high concentrations of total PCBs and dioxins/furans/dioxin-like PCBs. (uwf.edu)
Because of the paucity of information on sediment contamination in the Escambia Bay system, notably the limited spectrum of past analyses for PCB congeners and none for dioxins/furans, it is difficult to ascertain the geographical extent and levels of these toxic chemicals in the bay. (uwf.edu)
This project will determine the levels of PCBs (complete congener profiles) and dioxins/furans in sediment samples taken at 20 locations in the Escambia Bay, including some sites in the Lower Escambia River. (uwf.edu)
This study provides suggestive evidence that average serum concentrations of dioxins, furans, and PCBs are decreasing over time among residents of this town. (biomedcentral.com)
Dioxins and furans in sewage sludges : a review of their occurrence and possible sources in sludge and of their environmental fate, behaviour and significance in sludge-amended agricultural systems. (lancs.ac.uk)
Dioxins and furans in sewage sludges : a review. (lancs.ac.uk)
Polychlorinated dibenzo-p-dioxins and-furans (PCDD/Fs) are two groups of organic compounds that are ubiquitous in the environment at ultratrace levels, but that have attracted considerable scientific and political concern because of their environmental persistence, tendency to bioaccumulate through the foodchain, and toxicity. (lancs.ac.uk)

Synthesis, reactions, and application of furans and benzofurans bearing a fluorine atom and a trifluoromethyl group are reviewed. (springer.com)
The Feist-Benary synthesis is a classic way to synthesize furans, although many syntheses have been developed. (wikipedia.org)
One of the simplest synthesis methods for furans is the reaction of 1,4-diketones with phosphorus pentoxide (P2O5) in the Paal-Knorr synthesis. (wikipedia.org)
Many routes exist for the synthesis of substituted furans. (wikipedia.org)
The reaction product is a mixture of isomers with preference for the endo isomer: Diels-Alder reaction of furan with arynes provides corresponding derivatives of dihydronaphthalenes, which are useful intermediates in synthesis of other polycyclic aromatic compounds. (wikipedia.org)
Considerable attention has been focused on the synthesis of furan derivatives and screening them for pharmacological activity. (sigmaaldrich.com)
Diels-Alder reaction of furan with arynes provides corresponding derivatives of dihydronaphthalenes , which are useful intermediates in synthesis of other polycyclic aromatic compounds . (wikipedia.org)
This paper reports on the occurrence and synthesis of a newly discovered class of furan-containing fatty acid. (pnas.org)
A new strategy for cyclopenta[ b ]furan synthesis mediated by hypervalent iodine(III) has been described. (mdpi.com)
Chuang, T.-H. Hypervalent Iodine(III)-Induced Domino Oxidative Cyclization for the Synthesis of Cyclopenta[ b ]furans. (mdpi.com)
Synthesis, anthelmintic and antiacetylcholinesterase activity of newer furan derivatives. (ijpsonline.com)
An efficient CuI-catalyzed coupling cyclization of gem -difluoroalkenes with active methylene carbonyl compounds such as 1,3-dicarbonyl compounds, acetoacetonitrile, and phenylsulfonylacetone enables the synthesis of 2,3,5-trisubstituted furans with the assistance of a base. (organic-chemistry.org)
Very good isolated yields, and excellent functional group compatibility make this transformation a powerful tool for the synthesis of various furans. (organic-chemistry.org)
Palladium catalysis enables a highly efficient synthesis of a wide range of 2,5-disubstituted furans in very good yields from enyne acetates in the presence of a Lewis acid. (organic-chemistry.org)
Chapter 1 reviews the recent advances in the field of palladium catalyzed synthesis of bicyclic furan analogs and provides a mechanistic explanation for these processes. (usf.edu)
Chapter 2 describes synthesis of new optically pure isoxazoline-2-oxide and furan analogs using Pd(0) catalyzed intramolecular cyclizations. (usf.edu)
Khan, Pasha Moeenuddin, "Application of Pd catalyzed alkylation: Synthesis of bicyclic furans, isoxazolines and new cyclopentane amino acid analogs" (2008). (usf.edu)
Penn furan and furfural based solvents offer unique capabilities as starting materials for the synthesis of pharmaceutical, agricultural, and industrial chemicals. (chempoint.com)
Results: Among the various ionic resins attempted, Amberlyst-15® in PEG-400 was the choice of selection for the synthesis of 3-benzoyl-5-hydroxy benzofuran and naphtho[1,2-b]furan derivatives at room temperature in an environmentally friendly method. (eurekaselect.com)

Industrially, furan is manufactured by the palladium-catalyzed decarbonylation of furfural, or by the copper-catalyzed oxidation of 1,3-butadiene: In the laboratory, furan can be obtained from furfural by oxidation to 2-furoic acid, followed by decarboxylation. (wikipedia.org)
In the laboratory, furan can be obtained from furfural by oxidation to 2-furoic acid, followed by decarboxylation . (wikipedia.org)
Here we demonstrate that Baeyer-Villiger monooxygenases (BVMOs) can be used as biocatalysts for the selective oxidation of several furans, including 5-(hydroxymethyl) furfural (HMF) and furfural. (mdpi.com)
Phenylacetone monooxygenase (PAMO) and a mutant thereof (PAMO M446G ) were selected for studying their biocatalytic potential in converting furfural and some other furans. (mdpi.com)
P. putida ALS1267 was the most tolerant to furans and tolerated 17 mM furfural or 195 mM furoate before its growth rate was reduced by 50 % in a defined medium. (springer.com)

Body burden levels of dioxin, furans, and PCBs among frequent consumers of Great Lakes sport fish. (cdc.gov)

It is submitted in the Court that the Central Pollution Control Board does not have in-house mechanism in their laboratories to analyse Dioxin and Furans. (org.in)

Furan is a heterocyclic organic compound, consisting of a five-membered aromatic ring with four carbon atoms and one oxygen. (wikipedia.org)
Furan is a heterocyclic organic compound produced in the chemical manufacturing industry and also found in a broad range of food products, including infant formulas and baby foods. (nih.gov)

The ceric ammonium nitrate oxidation of the furo(3,2-b]naphtho[2,l-d]furan-8(9H)- ones (5c,5d) gave the rearranged hemiketals (llc,lld) in 72-76% yield. (auckland.ac.nz)

Furan is therefore listed as a possible human carcinogen. (wikipedia.org)

Furans form from a variety of substances naturally present in food, including vitamin C, carbohydrates, amino acids, unsaturated fatty acids and carotenoids. (europa.eu)
The study, published in the October, 2004 issue of Journal of Agricultural and Food Chemistry , shows how food-based amino acids and sugars break down when heated to produce furan. (bio-medicine.org)
The report generally describes 2-amino-1-furan-2-yl-ethanol, examines its uses, production methods, patents. (marketpublishers.com)
2-amino-1-furan-2-yl-ethanol manufacturers and suppliers with contacts and product range are mentioned in the study. (marketpublishers.com)
Furthermore, 2-amino-1-furan-2-yl-ethanol prices in regional markets can be found in the report with regards to countries and companies. (marketpublishers.com)
The report also focuses on 2-amino-1-furan-2-yl-ethanol consumers by providing data on companies that use it. (marketpublishers.com)
2-AMINO-1-FURAN-2-YL-ETHANOL (CAS 2745-22-4) Market Research Report 2017 contents were worked out and placed on the website in December, 2017. (marketpublishers.com)
Please note that 2-AMINO-1-FURAN-2-YL-ETHANOL (CAS 2745-22-4) Market Research Report 2017 is a half ready publication and contents are subject to change. (marketpublishers.com)
We provide independent and unbiased information on manufacturers, prices, production news and consumers for the global and regional (North America, Asia and Europe) market of {[(benzyloxy)carbonyl]amino}(furan-2-yl)acetic acid. (reportsnreports.com)
The main emphasis of this work is to utilize Pd catalyzed allylic alkylation to synthesize new heterocycles including furans, isoxazolines and new cyclopentane amino-acid analogs in an enantioselective manner. (usf.edu)

The crystal and molecular structure of 6-bromo-2-(furan-2-yl)-3-(prop-2-ynyl)-3H-imidazo[4,5-b]pyridine (C 13 H 8 BrN 3 O) has been investigated from single crystal X-ray diffraction data. (hindawi.com)
In this work, we have synthesized the 3-prop-2-ynyl analogue which is 6-bromo-2-(furan-2-yl)-3-(prop-2-ynyl)-3H-imidazo[4,5-b]pyridine ( 1 ) (Scheme 1 ). (hindawi.com)

Furans have one or two phenyl rings connected to a furan ring. (cdc.gov)
In the title compound, C 21 H 14 F 2 O 2 S, the dihedral angles between the mean plane [r.m.s. deviation = 0.007 (2) Å] of the benzo-furan ring system and the pendant 4-fluoro-phenyl and phenyl rings are 5.93 (9) and 80.23 (5)°, respectively. (iucr.org)
In November 2016, the EMCDDA and Europol examined the available information on a new psychoactive substance N -phenyl- N -[1-(2-phenylethyl)piperidin-4-yl]-furan-2-carboxamide, commonly known as furanylfentanyl, through a joint assessment. (europa.eu)

In the central fragment, consisting of two fused tetra-hydro-furan rings, one O atom and its two adjacent C atoms, a methyl-ene and a bridgehead C atom, are disordered over two sets of sites with an occupancy ratio of 0.735 (9):0.265 (9). (iucr.org)
1. 2-methyl furan is widely used as solvent. (guidechem.com)
2. Our 2- methyl furan annual output is 5000MT. (guidechem.com)

Exposure to furan at doses about 2000 times the projected level of human exposure from foods increases the risk of hepatocellular tumors in rats and mice and bile duct tumors in rats. (wikipedia.org)
Consumer exposure to furan and methylfurans in food could lead to possible long-term liver damage. (europa.eu)
EFSA carried out this assessment following its monitoring of furan levels in food and assessing consumer exposure. (europa.eu)
As did the Joint FAO/WHO Expert Committee on Food Additives [JECFA], we concluded that the level of exposure to furan in food indicates a human health concern. (europa.eu)
Although the average intake of foods containing furan indicates a low health concern for most consumers, for high consumers exposure is up to three times what would be considered of low concern for public health. (europa.eu)
There are some knowledge gaps about the toxicity of furan and methylfurans and about exposure to them. (europa.eu)
Dr Knutsen said: "Our opinion describes how cooking practices could reduce dietary exposure to furan and methylfurans, bearing in mind that consumers are exposed to them in a variety of foods. (europa.eu)
The level of furan in toast increases with toasting time and with the degree of browning, albeit toast is a less important contributor to overall furan exposure. (europa.eu)
calculating exposure requires consideration of both furan levels, and the amounts of food that consumers eat. (corn.org)
The agency also notes that their estimates of consumer exposure to furan is "well below what FDA expects would cause harmful effects. (corn.org)
It has been estimated that coffee consumption may be the highest contributor to furan exposure from dietary sources among adults. (oreilly.com)

The ' Global and Chinese Tetrahydro-2-Furan Methanol Industry, 2011-2021 Market Research Report ' is a professional and in-depth study on the current state of the global Tetrahydro-2-Furan Methanol industry with a focus on the Chinese market. (marketresearch.com)
The report provides key statistics on the market status of the Tetrahydro-2-Furan Methanol manufacturers and is a valuable source of guidance and direction for companies and individuals interested in the industry.Firstly, the report provides a basic overview of the industry including its definition, applications and manufacturing technology. (marketresearch.com)
Through the statistical analysis, the report depicts the global and Chinese total market of Tetrahydro-2-Furan Methanol industry including capacity, production, production value, cost/profit, supply/demand and Chinese import/export. (marketresearch.com)
The report then estimates 2016-2021 market development trends of Tetrahydro-2-Furan Methanol industry. (marketresearch.com)
In the end, the report makes some important proposals for a new project of Tetrahydro-2-Furan Methanol Industry before evaluating its feasibility. (marketresearch.com)
Overall, the report provides an in-depth insight of 2011-2021 global and Chinese Tetrahydro-2-Furan Methanol industry covering all important parameters. (marketresearch.com)
5.2 Market Competition of Tetrahydro-2-Furan Methanol Industry by Country (USA, EU, Japan, Chinese etc. (marketresearch.com)

The thiophene formation reaction of 1,4-diketones with Lawesson's reagent also forms furans as side products. (wikipedia.org)

Furan is a highly volatile compound present in many foods and drinks as a result of thermal treatment during processing. (oreilly.com)

Furan itself was first prepared by Heinrich Limpricht in 1870, although he called it "tetraphenol" (as if it were a four-carbon analog to phenol, C6H6O). (wikipedia.org)

Avantium, which spun-off from Shell in 2000, successfully completed an engine test to demonstrate the potential of its furan-based biofuels, or "furanics. (greencarcongress.com)

Furan a potentially dangerous chemical. (bio-medicine.org)
Furan, a potentially dangerous chemical has been found by Health Canada and the U.S. Food and Drug Administration (FDA) in processed foods, especially canned or bottled foods. (bio-medicine.org)
Normally, furan is a volatile chemical which tends to quickly evaporate. (bio-medicine.org)
TIANFUCHEM-- 4282-32-0 --High purity Dimethyl Furan-2,5-dicarboxylate factory price price,buy Formaldehyde,Formaldehyde supplier-Henan Tianfu Chemical Co., Ltd. (lookchem.com)

Furans or All Furans to refine by category, grade, purity, and various physical properties. (sigmaaldrich.com)

Different preparation methods for coffee result in different losses of furan concentrations. (europa.eu)

For other uses, see Furan (disambiguation) . (wikipedia.org)

Furan is a colorless, flammable, highly volatile liquid with a boiling point close to room temperature. (wikipedia.org)

Altogether, our study shows that BVMOs can be employed for the selective oxidation of furans. (mdpi.com)
Tailored photo-oxidation of the pro-reactive furan moiety is ensured by the simultaneous introduction of a weak photosensitizer as well as a nucleophilic moiety in the reacting PNA strand. (rsc.org)

Here, we show the first example of a visible light-triggered templated ligation on a surface, employing furan-modified peptide nucleic acids (PNAs). (rsc.org)

Furan is present in coffee as part of the volatile aroma components generated during roasting of green coffee beans. (oreilly.com)

Various furans are considered as valuable platform chemicals as they can be derived from plant biomass. (mdpi.com)
This increased understanding of the transformation of DMF and ethylene to p -xylene will aid in the development of a variety of renewable aromatics from biomass derived furans. (umass.edu)

Wood ducks were sensitive to dioxin and furan contamination, and we recommend it as an indicator species for monitoring biological impacts from these contaminants. (usgs.gov)

Male F344 rats were treated by gavage 5 days per week with 8 mg furan/kg body weight (bw)/day for 90 days. (nih.gov)
1 group of rats was sacrificed 24 h after the last treatment, whereas other groups were maintained without further furan treatment for an additional 90, 180, or 360 days. (nih.gov)

Furan is aromatic because one of the lone pairs of electrons on the oxygen atom is delocalized into the ring, creating a 4n + 2 aromatic system (see Hückel's rule) similar to benzene. (wikipedia.org)
wherein the molar ratio of 2,5-furan dicarboxylic acid to at least one of the polyfunctional aromatic acid or the hydroxy acid is in the range of 1 : 100 to 100: 1 , and wherein the molar ratio of diol to total acid content is in the range of 1 .2: 1 to 3: 1. (sumobrain.com)

It captures 3-[5-(3-hydroxy-propyl)-furan-2-yl]-propan-1-ol market trends, pays close attention to 3-[5-(3-hydroxy-propyl)-furan-2-yl]-propan-1-ol manufacturers and names suppliers. (marketpublishers.com)

Our dioxin and furan testing can identify where toxic emissions are occurring and help to improve the safety of your operations. (sgs.com)
For references , please go to https://www.eea.europa.eu/data-and-maps/daviz/eionet/sandbox/LOT2%20-%20Daviz%20testing%20environment/change-in-dioxin-furan-emissions or scan the QR code. (europa.eu)

2-(3-methyl-2-furfuryl)furan (webbook.nist.gov)

Koi Ha Furan - ARO HIROSHI - CDJapan eBook Service (cdjapan.co.jp)

2-Amino-1-(furan-2-yl)ethanol | C6H9NO2 - PubChem (pubchem.ncbi.nlm.nih.gov)

5-(2-Nitrophenyl)furan-2-carbonyl Chloride | C11H6ClNO4 - PubChem (pubchem.ncbi.nlm.nih.gov)

5-(2-Methyl-4-nitrophenyl)furan-2-carbonyl chloride | C12H8ClNO4 - PubChem (pubchem.ncbi.nlm.nih.gov)

Benzyl-(1-furan-2-YL-but-3-enyl)-amine hydrochloride | C15H18ClNO - PubChem (pubchem.ncbi.nlm.nih.gov)

N-(Furan-2-ylmethyl)-[1,3]thiazolo[5,4-d]pyrimidin-7-amine | C10H8N4OS - PubChem (pubchem.ncbi.nlm.nih.gov)

5-(Propan-2-yloxymethyl)furan-2-amine | C8H13NO2 - PubChem (pubchem.ncbi.nlm.nih.gov)

2,5-Dimethyl-furan-3-carboxylic acid (2-bromo-3-phenyl-allylidene)-hydrazide | C16H15BrN2O2 - PubChem (pubchem.ncbi.nlm.nih.gov)

3-(2-Amino-thiazol-4-yl)-5-oxo-tetrahydro-furan-3-carboxylic acid ethyl ester | C10H12N2O4S - PubChem (pubchem.ncbi.nlm.nih.gov)

3-Amino-N-(furan-2-ylmethyl)-5-methyl-6-thiophen-2-yl-4-(trifluoromethyl)thieno[2,3-b]pyridine-2-carboxamide | C19H14F3N3O2S2 -... (pubchem.ncbi.nlm.nih.gov)

2-{2-[4-(6-Fluoro-1-furan-3-ylmethyl-1H-indol-3-yl)piperidin-1-yl]ethoxy}benzoic acid | C27H27FN2O4 - PubChem (pubchem.ncbi.nlm.nih.gov)

2-[5-[2-(Trifluoromethyl)phenyl]furan-2-yl]quinoline-4-carboxylate | C21H11F3NO3- - PubChem (pubchem.ncbi.nlm.nih.gov)

1-(Cyclohepten-1-yl)-3-(furan-2-yl)propan-1-amine | C14H21NO - PubChem (pubchem.ncbi.nlm.nih.gov)

N-(Furan-2-ylmethyl)-8-methoxy-5H-pyrimido[5,4-b]indol-4-amine | C16H14N4O2 - PubChem (pubchem.ncbi.nlm.nih.gov)

2-(Furan-3-yl)-N-[2-[4-(methanesulfonamido)phenyl]ethyl]-1H-imidazo[4,5-b]pyridine-7-carboxamide | C20H19N5O4S - PubChem (pubchem.ncbi.nlm.nih.gov)

2-Amino-4,4,6,6-tetramethyl-4,6-dihydrothieno[2,3-c]furan-3-carbonitrile | VWR (us.vwr.com)

Fluorinated Furans and Benzofurans | SpringerLink (link.springer.com)

BPA and other Cord Blood Pollutants | Pollution in Minority Newborns | EWG (ewg.org)

Chapter 110. Analysis of Furan in Coffee - Coffee in Health and Disease Prevention [Book] (oreilly.com)

19 Chemicals You Didn't Know Were in Your Food Gallery (thedailymeal.com)

Catalysts | Free Full-Text | Conversion of Furans by Baeyer-Villiger Monooxygenases (mdpi.com)

Furan - Candidate List of substances of very high concern for Authorisation - ECHA (echa.europa.eu)

NIOSHTIC-2 Publications Search - 00133531 - Health hazard evaluation report: HETA-82-224-1336, Miami Fire Department, Miami,... (cdc.gov)

Synthesis and scavenging role of furan fatty acids | PNAS (pnas.org)

IDLH Value Profile: Furan | NIOSH | CDC (cdc.gov)

Organisms4

Diseases3

Chemicals and Drugs23

Analytical, Diagnostic and Therapeutic Techniques and Equipment1

Phenomena and Processes7

Disciplines and Occupations3

Anthropology, Education, Sociology and Social Phenomena3

Technology, Industry, Agriculture3

Information Science2

Health Care10

Publication Characteristics1

Development of muscarinic analgesics derived from epibatidine: role of the M4 receptor subtype. (1/1563)

A comparison of an A1 adenosine receptor agonist (CVT-510) with diltiazem for slowing of AV nodal conduction in guinea-pig. (2/1563)

Relationships between environmental organochlorine contaminant residues, plasma corticosterone concentrations, and intermediary metabolic enzyme activities in Great Lakes herring gull embryos. (3/1563)

Oxidative bioactivation of the lactol prodrug of a lactone cyclooxygenase-2 inhibitor. (4/1563)

Evolution of plant defense mechanisms. Relationships of phenylcoumaran benzylic ether reductases to pinoresinol-lariciresinol and isoflavone reductases. (5/1563)

Evidence that halogenated furanones from Delisea pulchra inhibit acylated homoserine lactone (AHL)-mediated gene expression by displacing the AHL signal from its receptor protein. (6/1563)

NADH-quinone oxidoreductase: PSST subunit couples electron transfer from iron-sulfur cluster N2 to quinone. (7/1563)

Role of metabolic activation in the pathogenesis of chemically induced pulmonary disease: mechanism of action of the lung-toxic furan, 4-ipomeanol. (8/1563)

Furans

Benzofurans

Dioxins

Furaldehyde

Cycloaddition Reaction

Cyclization

Anisoles

Aldehydes

Nitrofurans

Benzamidines

Polychlorinated Biphenyls

Bromobenzenes

Rhodium

Stereoisomerism

Molecular Structure

Diterpenes, Clerodane

Adenoma, Bile Duct

Alkynes

Tetrachlorodibenzodioxin

Environmental Policy

Environmental Pollution

Environment

United States Environmental Protection Agency

Conservation of Natural Resources

Environmental Health

Water

Incineration

Industrial Microbiology

Environmental Pollutants

Biofuels

Public Opinion

Public Health

Phylogeny

Molecular Sequence Data

Gene Regulatory Networks

Acetone

Mixed Function Oxygenases

Butylene Glycols

Oxygenases

Xanthine

Pentosyltransferases

Leishmania donovani

Equipment Contamination

News

Drug Contamination

Carps

Herpesviridae

Fish Diseases

Ictalurivirus

Herpesviridae Infections

Development of muscarinic analgesics derived from epibatidine: role of the M4 receptor subtype. (1/1563)

A comparison of an A1 adenosine receptor agonist (CVT-510) with diltiazem for slowing of AV nodal conduction in guinea-pig. (2/1563)

Relationships between environmental organochlorine contaminant residues, plasma corticosterone concentrations, and intermediary metabolic enzyme activities in Great Lakes herring gull embryos. (3/1563)

Oxidative bioactivation of the lactol prodrug of a lactone cyclooxygenase-2 inhibitor. (4/1563)

Evolution of plant defense mechanisms. Relationships of phenylcoumaran benzylic ether reductases to pinoresinol-lariciresinol and isoflavone reductases. (5/1563)

Evidence that halogenated furanones from Delisea pulchra inhibit acylated homoserine lactone (AHL)-mediated gene expression by displacing the AHL signal from its receptor protein. (6/1563)

NADH-quinone oxidoreductase: PSST subunit couples electron transfer from iron-sulfur cluster N2 to quinone. (7/1563)

Role of metabolic activation in the pathogenesis of chemically induced pulmonary disease: mechanism of action of the lung-toxic furan, 4-ipomeanol. (8/1563)

Furan 27.5 - Psynydebikes

2-Oxo-2,3-dihydrofuran-5-acetate

FURANS - English word

2S,5R)-5-(6-Aminopurin-9-yl)-2,5-dihydrofuran-2-yl]methanol | C10H11N5O2 - PubChem

PROCESS FOR THE PREPARATION OF NAPHTHALEN-2-YL-PYRAZOL-3-ONE INTERMEDIATES USEFUL IN THE SYNTHESIS OF SIGMA RECEPTOR INHIBITORS...

methylsulphonyl)benzene (CAS 3112-85-4) Market Research Report 2018

Dioxins and Furans | Environment | SGS

Tire-derived fuel - Wikipedia

CAS 110-00-9 : FURAN (FURANE)

QAYBTII SADEXAAD EE DOODII MAXAAN KU MUTAYSTAY HEYBSOOCA DOOD FURAN | Toggaherers Blog

Tetrahydrofuran Manufacturer,Tetrahydrofuran Supplier,Exporter

United States Tetrahydrofuran Market Report 2021 : ReportsnReports

Kahr Research Group Publications 1986-1991

Dichloromethyl[2-(trichlorosilyl)ethyl]silane

Concanavalin A/bovine serum albumin-incorporated LA-conjugated Tetronic® 1107 micelles aggregates

CAS No.497-23-4,2(5H)-Furanone Suppliers,MSDS download

5-Fluoro-7-(methylsulphonyl)-1H-indole-2-carboxylic acid - Alfa Chemistry

APGC-MS/MS Investigation of a Complex Mixture of Polyhalogenated Dioxins and Furans (PXDD/Fs) Generated in Fire Debris : Waters

Dioxins & Furans Reference Materials | LGC Standards

BROMINATED DIOXIN/FURAN LABELED COMPOUNDS (13C12, 99%) - Creative Proteomics

中国科学院上海有机化学研究所机构知识库(SIOC OpenIR): A general and efficient synthesis of substituted furans and dihydrofurans via gold-catalyzed...

MODIFIED JIS LOW CONCENTRATION DIOXIN & FURAN CALIBRATION SOLN CS2L (UNLABELED/13C12, 99%) - Creative Proteomics

$Study to Assess Safety and Preliminary Activity of Eribulin Mesylate in Pediatric Participants With Relapsed/Refractory...$ Study to Assess Safety and Preliminary Activity of Eribulin Mesylate in Pediatric Participants With Relapsed/Refractory...