Alternative Routes to the Pyrazolo[4,3-e][1,2,4]triazolo-[1,5-c]pyrimidine System |
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| Authors: | R. V. Tyurin E. V. Vorob’ev L. G. Minyaeva V. V. Krasnikov V. V. Mezheritskii |
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| Affiliation: | (1) Institute of Physical and Organic Chemistry, Rostov State University, pr. Stachki 194/2, Rostov-on-Don, 344090, Russia |
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| Abstract: | Formimidic acid esters derived from 1-substituted 5-aminopyrazole-4-carbonitriles reacted with carboxylic acid hydrazides on heating to give 2,7-disubstituted pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine derivatives as a result of double heterocyclization. The same compounds were obtained by thermal recyclization of 1-aroyl-2-(1-R-pyrazolo[3,4-d]pyrimidin-4-yl)hydrazines.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 6, 2005, pp. 934–938.Original Russian Text Copyright © 2005 by Tyurin, Vorob’ev, Minyaeva, Krasnikov, Mezheritskii. |
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