Study on the Hydrocyanation Reaction of Trifluoromethylated Acylhydrazones

The Lewis acid catalyzed 1,2-addition reaction of trifluoromethylated acylhydrazones with trimethylsilyl cyanide was investigated, and a series of cyanohydrazide compounds containing trifluoromethyl group were afforded in high yield. The method could be easily operated in mild reaction conditions, which provides an efficient method for the synthesis of trifluoromethylated hydrazides with structural diversity.