Synthesis of halogenated hydrazone derivatives and their applicability in the preparation of 4-chloropyrazoles

1986 
La reaction de l'imine d'aryl-1 phenyl-1'' ethylidene-2' hydrazino-3 butene-2one-1 avec le N-chlorosuccinimide conduit au derive chloro-2; ce derive, traite par des acides mineraux ou l'acide trifluoroacetique conduit aux aryl-5 chloro-4 methyl-3 pyrazoles et a leurs derives phenyl-1' vinyl-1
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