Abstract
A facile method to prepare difluoromethylenes, including α,α-difluorobenzyl chlorides, by single C-F transformations of benzotrifluorides is disclosed. The C-F cleavage followed by chlorination proceeded smoothly using trityl chloride through the generation of trityl cation as an activator and chloride anion as a nucleophile. Diverse difluoromethylenes such as difluorobenzyl ethers were efficiently prepared by virtue of the good versatility of the resulting chloro and fluorosilyl groups.
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