New oxidation–reduction polymers on the basis of pyridine nitriles

Ergozhin, E. E.; Mukhitdinova, B. A.; Shaligina, V.V.; Shekeeva, B. Zh.; Sartbaeva, K. M.

doi:10.1016/j.reactfunctpolym.2004.12.003

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“…Mono-and dicyanopyridines have become very important in the recent years since they form the starting materials for a number of valuable intermediates of medicines, animal feed additives, food additives and other commodities. [1][2][3] Oxidative ammonolysis of mono-and dimethylpyridines is the most rational method for obtaining mono-and dicyanopyridines. 4,5 Oxidative ammonolysis of dialkylpyridines of the unsymmetrical structure showed that alkyl groups at positions 2 and 4 are more reactive than in positions 3 and 5.…”

Section: Introductionmentioning

confidence: 99%

Oxidative ammonolysis of 3,4-dimethylpyridine on the vanadium oxide catalysts

Vorobyev¹,

Serebryanskaya²,

Yugay³

et al. 2020

JSCS

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Oxidative ammonolysis of 3,4-dimethylpyridine on an individual vanadium oxide (V 2 O 5 ) catalyst and binary vanadium oxide catalysts, modified by additions of SnO 2 and ZrO 2 , has been studied. A connection between СНacidity of the methyl groups of the substrate in the gaseous phase and in the chemosorbed state and the sequence of their transformation into a cyano group has been established. It has been shown that nucleophilicity of vanadyl oxygen, calculated by the Density Functional Theory method, increases with V 2 O 5 modification by SnO 2 and ZrO 2 additions. Herewith, an increasing yield of 3methyl-4-cyanopyridine and imide of pyridine-3,4-dicarboxylic acid was observed. A proposed mechanism of the imide of pyridine-3,4-dicarboxylic acid formation has been discussed

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