New synthesis of steroidal trihalogenomethylallenes, allenic acids, and β-keto-esters
Abstract
Reaction of 2-chloro-1,1,2-trifluorotriethylamine with cyclopropenonyl- and difluorocyclopropenyl-methanols caused cleavage of a cyclopropane bond and formation of an allenic acid fluoride and a pair of trifluoromethylallenes, respectively.
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