Three ways of reactions of 5-(3,5-dimethyl-1H-pyrazol-1-yl)-2-phenyl-1,3-oxazole-4-carbonitrile and its analogs with nitrogen-containing bases View Full Text


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Article Info

DATE

2008-04

AUTHORS

O. V. Shablykin, V. S. Brovarets, E. B. Rusanov, B. S. Drach

ABSTRACT

Substituted 5-(3,5-dimethyl-1H-pyrazol-1-yl)-1,3-oxazole-4-carbonitrile differently react with nitrogen bases having different numbers of labile hydrogen atoms. Treatment of the title compounds with secondary amines or morpholine results in nucleophilic replacement of the pyrazolyl substituent at C5, the ozaxole ring remaining unchanged. Their reactions with primary amines are accompanied by cleavage of the oxazole ring with formation of the corresponding enamino nitriles. Hydrazine hydrate acts in a similar way, but enehydrazino nitriles thus formed undergo fast cyclization to give new 4,5-diaminopyrazole derivatives. The latter can be converted into substituted pyrazolo[1,5-a]pyrimidines whose structure has been proved by X-ray analysis. More... »

PAGES

655-661

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s1070363208040233

DOI

http://dx.doi.org/10.1134/s1070363208040233

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1035542616


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