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Paper | Regular issue | Vol 68, No. 12, 2006, pp.2515-2525
Published online, 24th October, 2006
DOI: 10.3987/COM-06-10877
Recyclization of 7-Fluoroalkyl-4,7-dihydroazolo[5,1-c]triazines into 5-(Pyrazolinylhydrazono)azoles in the Reactions with Hydrazides and Thiosemicarbazide

Olga G. Khudina, Evgeny V. Shchegol’kov, Yanina V. Burgart, Mikhail I. Kodess, Victor I. Saloutin,* and Oleg N. Chupakhin

*Institute of Organic Synthesis, Urals Branch, Russian Academy of Sciences, 20, S. Kovalevskaya st., Ekaterinburg, GSP-147, 620219, Russia

Abstract

7-Fluoroalkyl-4,7-dihydroazolo[5,1-c][1,2,4]triazines react with hydrazides and thiosemicarbazide to form 5-(5-hydroxy-5-polyfluoroalkyl-2-pyrazoline-4-ylhydrazono)azoles as a result of triazine ring opening at bond C-7-N-8 and followed by regio-selective condensation.