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*  Ionic liquid
Examples include compounds based on the 1-Ethyl-3-methylimidazolium (EMIM) cation and include: EMIM:Cl, EMIM dicyanamide, (C 2H ... In the 1970s and 1980s, ionic liquids based on alkyl-substituted imidazolium and pyridinium cations, with halide or ... Saturated aliphatic compounds are generally only sparingly soluble in ionic liquids, whereas olefins show somewhat greater ... Their properties of low vapor pressure, thermal stability, and solvation for a wide variety of compounds and gases make them ...
*  Pyridinium
... an important pyridinium compound is the herbicide paraquat. Pyridinium chlorochromate George A. Olah, Michael Watkins (1978). " ... The pyridinium ion also plays a role in Friedel-Crafts acylation. When pyridine is included, it forms a complex with the ... Pyridinium refers to the cation [C5H5NH]+. It is the conjugate acid of pyridine. Many related cations are known involving ... Pyridinium cations are aromatic ion, as determined through Hückel's rule. It is isoelectronic to benzene. When the acidic ...
*  Nicotinamide riboside
"Codehydrogenase I and other pyridinium compounds as V factor for Haemophilus influenzae and Haemophilus parainfluenzae". J. ... NR was the compound that led to the most rapid growth of this bacterium. Notably, H. influenza cannot grow on nicotinic acid, ...
*  Pyridine
The Zincke reaction is used for the selective introduction of radicals in pyridinium compounds (it has no relation to the ... The pyridinium cation is isoelectronic with benzene. Pyridinium p-toluenesulfonate (PPTS) is an illustrative pyridinium salt; ... So fluorine is the best leaving group for the substitution with organolithium compounds. The nucleophilic attack compounds may ... "Pyridinium Chlorochromate. An Efficient Reagent for Oxidation of Primary and Secondary Alcohols to Carbonyl Compounds". ...
*  List of MeSH codes (D03)
... pyridinium compounds MeSH D03.383.725.762.232 --- cetylpyridinium MeSH D03.383.725.762.300 --- desmosine MeSH D03.383.725.762. ... quinolinium compounds MeSH D03.438.810.824.200 --- dequalinium MeSH D03.438.810.824.700 --- pyrvinium compounds MeSH D03.438. ...
*  Photopolymer
There are several classes of cationic initiators including: Onium salts, organometallic compounds and pyridinium salts. As ... Although there are a diverse group of compounds activated by cationic photoinitiators, the compounds that find most industrial ... The typical onium compound used as a photoinitiator contains two or three arene groups for iodonium and sulfonium respectively ... Subsequently, many compounds were found to become dissociated by light and found immediate use as photoinitiators in the ...
*  Cephaloridine
The cationic group (pyridinium ring) of the compound probably inhibits the efflux through the membrane. This results in an ... The pyridinium side-group of cephaloridine has unstable bonds to the core of the compound (in comparison with other ... Cephaloridine is a cephalosporin compound with pyridinium-1-ylmethyl and 2-thienylacetamido side groups. The molecular nucleus ... The pyridinium side-group interacts with the reduced NADP in a redox cycle. It has been suggested that superoxide anion ...
*  Alpha-4 beta-2 nicotinic receptor
... pyridinium bromide (compound 2) (heterobivalent ligand: D2R agonist and nAChR antagonist) Oxantel α3β2-Nicotinic receptor α3β4- ... "Bifunctional compounds targeting both D2 and non-α7 nACh receptors: Design, synthesis and pharmacological characterization". ... no change in maximum efficacy Desformylflustrabromine Further compounds.. (see references →) (−)-7-methyl-2-exo-[3'-(6-[18F] ...
*  Dopamine receptor D2
... pyridinium bromide (compound 2, D2R agonist and nAChR antagonist) UNC9994 The dopamine receptor D2 has been shown to interact ... "Bifunctional compounds targeting both D2 and non-α7 nACh receptors: Design, synthesis and pharmacological characterization". ...
*  Basic aromatic ring
Basic aromatic compounds get protonated and form aromatic cations (e.g. pyridinium) under acidic conditions. Typical examples ... In these compounds the nitrogen atom is connected to a hydrogen atom. Examples of non-basic nitrogen-containing aromatic rings ... In these compounds the nitrogen atom is not connected to a hydrogen atom. ...
*  Kröhnke pyridine synthesis
1,3-dicarbonyl compounds have also been shown to be viable starting materials in place of the α-pyridinium methyl ketone salts ... These compounds were then reacted with various α-pyridinium methyl ketones 32 to give the desired tri-substituted pyridine 33. ... α-pyridinium acyl ketone salt 39 was cyclized with pinocarvone derivative 40 to generate pyridine 41. The benzylic position of ... The pyridinium cation is then eliminated to form hydroxy-dienamine 12. Aromatization of 12 via subsequent loss of water ...
*  Oxoammonium-catalyzed oxidation
Chromium-based reagents such as pyridinium chlorochromate can also be used to convert alcohols to carbonyl compounds; although ... and dried under vacuum to yield the title compound (0.275 g, 90%): mp 246-249° (dec); 1H NMR (DMSO-d6, 400 MHz, 50°) δ 8.23 (s ... with oxoammonium salt to give nitroxide radicals and pyridinium salts (see equation (3) below). Because this reaction consumes ... react with alcohols to form carbonyl compounds. The other two equivalents of oxoammonium (red) undergo comproportionation to re ...
*  Pyridinium perbromide
The analogous quinoline compound behaves similarly. Pyridinium tribromide can be obtained by reacting pyridinium hydrobromide ... Pyridinium perbromide (also called pyridinium bromide perbromide, pyridine hydrobromide perbromide, or pyridinium tribromide) ... Pyridinium tribromide is a crystalline red solid which is virtually insoluble in water. Pyridinium tribromide is used as a ... It can also be considered as a complex containing pyridinium bromide-the salt of pyridine and hydrogen bromide-with an added ...
*  Pyridinium chlorochromate
A variety of related compounds are known with similar reactivity. Although no longer widely used, PCC offers the advantage of ... Pyridinium chlorochromate (PCC) is a yellow-orange salt with the formula [C5H5NH][CrO3Cl]. It is a reagent in organic synthesis ... One disadvantage to the use of PCC is its toxicity, which it shares with other hexavalent chromium compounds. Oxidation with ... doi:10.1016/S0040-4039(00)75204-X. Agarwal, S.; Tiwari, H. P.; Sharma, J. P. (1990). "Pyridinium Chlorochromate: An Improved ...
*  Cornforth reagent
... is a pyridinium salt of dichromate with the chemical formula [C5H5NH]2[Cr2O7]. This compound is named after the Australian- ... Among organic acids, acetic acid, pyridinium trifluoroacetate or pyridinium tosylate can be added, the first one being most ... Pyridinium dichromate, MSDS, Alfa Caesar Alexander Senning Elsevier's dictionary of chemoetymology: the whies and whences of ... In its chemical structure and functions it is closely related to other compounds made from hexavalent chromium oxide, such as ...
*  Elias James Corey
One of these advantages is that the compound is available as an air-stable yellow solid that is not very hygroscopic. Unlike ... E.J. Corey has developed several new synthetic reagents: PCC (pyridinium chlorochromate), also referred to as the Corey-Suggs ... The formations of dithianes can be accomplished with a Lewis acid (scheme 7) or directly from carbonyl compounds. The pKa of ... Corey, E.J.; Suggs, W. (1975). "Pyridinium chlorochromate. An efficient reagent for oxidation of primary and secondary alcohols ...
*  Jones oxidation
Several other chromium compounds are used for the oxidation of alcohols. These include Collins reagent and pyridinium ... Researches on acetylenic compounds. Part XV. The oxidation of primary acetylenic carbinols and glycols". J. Chem. Soc.: 604. ... Researches on acetylenic compounds. Part I. The preparation of acetylenic ketones by oxidation of acetylenic carbinols and ... The chemistry of the triterpenes and related compounds. Part XVIII. Elucidation of the structure of polyporenic acid C". J. ...
*  Oxidizing agent
... pyridinium chlorochromate (PCC), and chromate/dichromate compounds Permanganate compounds such as potassium permanganate Sodium ... and other analogous halogen compounds Hypochlorite and other hypohalite compounds, including household bleach (NaClO) ... and nitrate compounds Sulfuric acid (H2SO4) Peroxydisulfuric acid (H2S2O8) Peroxymonosulfuric acid (H2SO5) Chlorite, chlorate, ... Hexavalent chromium compounds such as chromic and dichromic acids and chromium trioxide, ...
*  Organophosphate poisoning
PON1 hydrolyzes the metabolites, not the parent compounds of insectides. The presence of PON1 polymorphisms causes there to be ... Atropine can be used as an antidote in conjunction with pralidoxime or other pyridinium oximes (such as trimedoxime or ... Current antidotes for OP poisoning consist of a pretreatment with carbamates to protect AChE from inhibition by OP compounds ... Structure-activity relationship and efficacy in the treatment of poisoning with organophosphorus compounds". Curr. Med. Chem. ...
*  Pralidoxime
Structure-activity relationship and efficacy in the treatment of poisoning with organophosphorus compounds". Curr. Med. Chem. ... Jokanović M, Prostran M (2009). "Pyridinium oximes as cholinesterase reactivators. ... belongs to a family of compounds called oximes that bind to organophosphate-inactivated acetylcholinesterase. It is used to ... "Current understanding of the application of pyridinium oximes as cholinesterase reactivators in treatment of organophosphate ...
*  Obidoxime
Oximes are drugs known for their ability to reverse the binding of organophosphorus compounds to the enzyme ... Jokanović M, Prostran M (2009). "Pyridinium oximes as cholinesterase reactivators. Structure-activity relationship and efficacy ... This results in full enzyme recovery and the phosphate-oxime compound is eliminated from the organism via urine. Oximes like ... in the treatment of poisoning with organophosphorus compounds". Curr. Med. Chem. 16 (17): 2177-88. doi:10.2174/ ...
*  Methylpyridinium
Pyridinium 4-Caffeoyl-1,5-quinide Coffee portal "Highly Active Compound Found In Coffee May Prevent Colon Cancer". ScienceDaily ... Methylpyridinium is a chemical compound which is the quaternary ammonium compound derived from the N-methylation of pyridine. ... salts containing methyl substituted pyridinium cations". Materials chemistry and physics. 50 (1): 20-24. doi:10.1016/S0254-0584 ...
*  Onium compound
R pyridinium, C 5H 5NH+ (protonated pyridine) quaternary ammonium cations having one triple-bonded substitution and one single- ... Onium compounds at IUPAC Onium compounds at IUPAC Overview at chem.qmul.ac.uk Onium compounds at the US National Library of ... Compounds of an onium cation and some other negative ion are known as onium compounds or onium salts. Onium ions and onium ... protonated organomercury compounds; formed as intermediates in oxymercuration reactions) carbynium ions, protonated carbynes, ...
*  Catenane
A limited number of (rapidly interchanging) conformers exist for this type of compound. In handcuff-shaped catenanes, two ... diffraction shows that due to pi-pi interactions the aromatic group of the cyclophane is held firmly inside the pyridinium ring ... "A catenane consisting of a large ring threaded through both cyclic units of a handcuff-like compound". Chemical Communications ...
*  Collins reagent
Jones oxidation Pyridinium chlorochromate Pyridinium dichromate Sarett oxidation J. C. Collins, W. W. Hess and F. J. Frank ( ... Moreover, the Collins reagent is especially useful for oxidations of acid sensitive compounds. This complex is both difficult ... It can be used as an alternative to the Jones reagent and pyridinium chlorochromate (PCC) when oxidizing secondary alcohols to ... Accountius noted an isolation in the compound with the empirical composition CrO3•2C5H5N, a brick-red complex, from a reaction ...
*  3-Alkylpyridinium
It appears that the 3-APs compounds that are polymeric in nature are able to permeabilize the cells. In addition the compounds ... Synthesis of 3-Alkyl Pyridinium Alkaloids from the Arctic Sponge Haliclona viscosa Marine Drugs. 2010; 8(3): 483-497 Laville R ... This compound might be an interest to the scientist because of its useful biologic impacts but meanwhile there have not been ... Therefore, these natural compounds have a great future to provide environmental friendly ingredient in the new generation of ...
*  Transition metal oxo complex
More selective or gentler oxidizing reagents include pyridinium chlorochromate (PCC) and pyridinium dichromate (PDC). Metal oxo ... Oxo compounds for the vanadium through iron triads (groups 3-8) are well known, whereas terminal oxo compounds for metals in ... Iron(IV)-oxo compounds are intermediates in many oxidations catalysed by heme-containing enzymes. One of the most widely ... Some of the longest known and most widely used oxo compounds are oxidizing agents such as potassium permanganate (KMnO4) and ...