Abstract

A mild and transition-metal-free protocol is herein presented for chloro-, bromo- and trifluoromethylthiotrifluoromethylation of unactivated alkenes. The easy-handling Langlois reagent, as well as N-halophthalimide and N-trifluoromethylthiosaccharin, is used in this method. In the presence of an organic photoredox catalyst N-methyl-9-mesityl acridinium, a broad range of desired products were afforded in satisfactory yields upon visible-light irradiation via a radical process.

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