pyridine In A Sentence
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- Copper hydride reversibly precipitates from pyridine solution, as an amorphous solid.
- The process of 2 - chloropyridine chlorination synthesis by pyridine and application were introduced.
- In this thesis, 2-chloro-5-chloromethyl pyridine is ammoniated, which followed by the reaction with N-cyano ethyl ethylimidoate, finally is methylated to gain the objective product.
- "' Pyrimidine "'is an aromatic heterocyclic organic compound similar to pyridine.
- 2, 6-Bis ( chloromethyl ) pyridine is treated with three equivalents of triphenylphosphine and refluxed with dimethylformamide and is afforded the bisphosphonium salt.
- Pyridine barbituric acid colorimetry.
- Like the related molecule pyridine and quinoline, acridine is mildly basic.
- The carbanion forms by proton abstraction of the acidic ?-proton by pyridine ( now serving a double role ) akin to the Knoevenagel condensation.
- Boron substituted polyaromatic mesophase was prepared by co pyrolysis of a coal tar pitch with pyridine borane complex under autogeneous pressure.
- Substitution of one C-H in pyridine with a second N gives rise to the diazine heterocycles ( C 4 H 4 N 2 ), with the names pyridazine, pyrimidine, and pyrazine.
- Aldehyde - ammonia condensation reaction is one of the typical routes to manufacture alkyl pyridine.
- The pyridine was chemisorbed at both Lewis and Bronsted sites on the glass surface.
- Pyridine, C 5 H 5 N, an organic base, discovered by T.
- Pyridine can also be reduced to piperidine via a modified Birch reduction using sodium in ethanol.
- Isoxicam is a chemical analog of piroxicam ( Feldene ) which has a pyridine ring in lieu of an isoxazole ring.
- Both pyrimidines and purines resemble pyridine and are thus weak bases and relatively unreactive towards electrophilic aromatic substitution.
- Pyridine gives origin to: pyridazine or ortho-diazine, pyrimidine or metadiazine, pyrazine or para-diazine, osotriazine, unsymmetrical triazine, symmetrical triazine, osotetrazone and tetrazine.
- IR results of pyridine adsorption reveal that supported samples have both Bronsted and Lewis acid centers, and 2-propanol dehydration is a Bronsted acid catalysed reaction.
- Degradation of pyridine derivatives in soil.
- Related molecules discovered in the meteorites include pyridine carboxylic acids and pyridine dicarboxylic acids.
- Typical bases include pyridine and triethylamine.
- The pyridine ligand replaced during the reaction is restored after its completion.
- The main composition of this wastewater is acetaldehyde, paraldehyde, metaldehyde, pyridine and some acetaldehyde polymers.
- The amount of eugenol in oil of cloves can be estimated by acetylation, in presence of pyridine (A.
- THC phosphate ester is made by reacting THC with phosphoryl chloride using pyridine as a solvent, following by quenching with water to produce THC phosphate ester.
- Pyridine is alkaline the production that uses extensively at medicine, pesticide, flavor, balata and dye.
- Preparation of the ?-pyridinium methyl ketone salts can be easily achieved by treatment of the corresponding ?-bromo methyl ketone with pyridine.
- It also occurs with pyridine and its homologues in bone-oil.
- Using this strategy, Fowler and coworkers were able to use the 1-aza-Cope rearrangement to create piperidine and pyridine derivatives.
- Through production and pyridine nucleotide interactions, photorespiration makes a key contribution to cellular redox homeostasis.
- The amount of pyridine produced in most of these processes is very small, and the best source for its preparation is the "light-oil" fraction of the coal-tar distillate.
- The analine may be an amino pyridine.
- Each filter uses a pair of solutions, comprising specific amounts of distilled water, copper sulfate, mannite, pyridine, sulfuric acid, cobalt, and ammonium sulfate.
- These include arsole, the arsenic analogue of pyrrole, and arsabenzene, the arsenic analogue of pyridine.
- "' Benzoxazole "'is an aromatic organic compound with a molecular formula C 7 H 5 NO, a benzene-fused oxazole ring structure, and an odor similar to pyridine.
- They include the Chichibabin reaction, which yields pyridine derivatives aminated at the 2-position.
- In the isodesmic reactions designed for the computation of heats of formation (HOFs), pyrazine and pyridine were chosen as reference compounds.
- The chemical structure of pyridine was determined decades after its discovery.
- Hyperbranched aromatic polyamides were prepared by direct polycondensations of the two monomers in the presence of triphenyl phosphite and pyridine as condensation agents in NMP.
- The this paper , some of Heterocycle Compound which including pyridine, imidazole, thiazole, pyrimidine, indol etc, use for pharmaceutical intermediates or raw were summarized.
- Sulfur trioxide pyridine complex.
- Conversely, when the lone pair does not contribute to aromaticity ( e . g . pyridine ), the electronegativity of the heteroatom wins out and weakens the cation-? binding ability.
- 2-Mercaptopyridine derivatives can also be generated from precursors lacking preformed pyridine rings.
- The crude anthracene cake is purified by treatment with the higher pyridine bases, the operation being carried out in large steam-jacketed boilers.
- Thiazole itself is a pale yellow liquid with a pyridine-like odor and the molecular formula C 3 H 3 NS . The thiazole ring is notable as a component of the vitamin thiamine ( B 1 ).
- The crystallized anthracene is then removed by a centrifugal separator and the process of solution in the pyridine bases is repeated.
- And the excess volume of toluene - pyridine was measured with the dilatometer.
- A rapid micromethod for the determination of nitrogen in organic compounds, such as pyridine, pyrimidine, purine, thiazole, alkaloids and amino acids, is described.
- It is a reddish amorphous mass, insoluble in alcohol, and when distilled yields picoline (methyl pyridine) (A.
- A classical method to determine the content of cinnamaldehyde is called hydrochloride hydroxylamine - pyridine oximation.
- In this way the 1, 2, 4-triazines can be reacted with alkynes to form pyridine rings.
- "' Triclopyr "'( 3, 5, 6-Trichloro-2-pyridinyloxyacetic acid ) is an organic compound in the pyridine group that is used as a systemic, foliar herbicide and fungicide.
- For the 2-pyridine boronic acid, the zwitterionic compound is responsible for its rapid protodeboronation under neutral pH, through a unimolecular fragmentation of the C-B bond.
- The attachment locant " 4 " in each pyridine amplificant is invariant.
- The pentaol "'39 "'was protected twice : two bottom hydroxyl groups as a carbonate ester ( bis ( trichloromethyl ) carbonate, pyridine ) and the C10 hydroxyl group as the acetate forming "'40 " '.
- When dyeing, 3-carboxyl pyridine group disconnects froms-triazine, and the cellulosic carboxylic group reacts withs-triazine rapidly to form a covalent bond, thus effects the colour fixation.
- The effects of solvent of Grignard reagent, pyridine hydrochloride and boron tribromide on yield of product were investigated.
- With pyridine as a base and solvent, refluxing conditions are required.
- Pyridine and pyridine production base is also a feed additive main raw material for nicotinic acid.
- It can be prepared from bis-triazinyl pyridine.
- The HDS, HDN and HDY activities of the catalysts were tested with model compounds consisted of thiophene, dibenzothiophene, pyridine, quinoline, cyclohexene, hexamethylene.
- The complex also releases tiny amounts of pyridine vapor which is a possible carcinogen.
- A Diels Alder reaction between two pyridine functionalized substrates normally yield a mixture of endo and exo products.
- Dibenzyl phosphite was synthesized by benzyl alcohol and trichlorophosphorous in the presence of pyridine.
- Beneficial effects on the binding is seen with substitution on the pyridine ring both mono-and disubstitution with halogens among other groups.
- Pyridine is readily degraded by bacteria to ammonia and carbon dioxide.
- Rhombic sulphur may be obtained artificially by slowly crystallizing a solution of sulphur in carbon bisulphide, or, better, by exposing pyridine saturated with sulphuretted hydrogen to atmospheric ox
- It is a derivative of pyridine with a carboxylic acid substituent at the 4-position.
- Historically, pyridine was produced from coal tar and as a byproduct of coal gasification.
- The catalyst deactivation kinetics of pyridine chlorination was investigated in an integral fixed reactor.
- These compounds were then reacted with various ?-pyridinium methyl ketones "'32 "'to give the desired tri-substituted pyridine "'33 " '.
- A charge-transfer salt was synthesized with 12 - molybdophosphoric acid and pyridine in aqueous solution.
- Pyridine itself is a relatively weak ligand in forming quantitative analysis of iron.
- In the original titrimetric solution, known as Karl Fischer Reagent, the sulfur dioxide and iodine are dissolved in pyridine and methanol.
- Thus, axon protection is likely to be mediated by altered ubiquitination or pyridine nucleotide metabolism.
- This is evident from the unusual small B-N bond length of 158 picometer compared to 165pm for ordinary B-N bonds in borane-pyridine adducts.
- These results indicated that a suitable substituent at the 2-position of pyridine ring and a well-fit group at the 3-position of acrylate were both essential for hi.
- The 2,6 dipicrylamino 3,5 dinitro pyridine ( PYX ) pureness reference material had been certificated by potentiometric method.
- Pyrrol is readily converted into pyridine derivatives by acting with bromoform, chloroform, or methylene iodide on its potassium salt, t3-brom-and O-chlorpyridine being obtained with the first two com
- In addition to benzene, acetylene and ethene, pyridine also decomposes on ruthenium surfaces, leaving bound fragments on the surface.
- Pyridine derivatives are commonly used for ortho-selective C-H functionalization.
- :glycerone phosphate + iminosuccinate rightleftharpoons pyridine-2, 3-dicarboxylate + 2 H 2 O + phosphate.
- Hofmann had shown that conine on distillation with zinc dust gave a-propyl pyridine (conyrine).
- A 2,6-bis(carbamoyl) pyridine-modified diserine pseudopeptide 1 was synthesized and characterized by 1H NMR, FAB-MS and elemental analysis.
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