Distinguishing Features of reactions of 2-chloro-and 2, 2-dichloro (bromo) vinyl ketones with alkyl-and arylhydrazines

GV Bozhenkov, VA Savosik, LI Larina, LV Klyba…

文献索引：Bozhenkov; Savosik; Larina; Klyba; Zhanchipova; Mirskova; Levkovskaya Russian Journal of Organic Chemistry, 2008 , vol. 44, # 7 p. 1014 - 1023

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被引用次数: 6

摘要

Abstract 2-Chlorovinyl alkyl ketones react with alkylhydrazines to give mixtures of 1-R-3-R′- and 1-R-5-R′-pyrazoles: The 1-R-3-R′-pyrazoles form through the heterocyclization of 2- chlorovinyl ketone alkylhydrazones whereas in the heterocyclization into 1-R-5-R′- pyrazoles N 1-alkyl-N 2-(2-acylvinyl) hydrazines are involved. The regiospecific heterocyclization of 2-chloro-and 2, 2-dichlorovinyl ketones with arylhydrazines and also ...