Difluoroiodomethane: practical synthesis and reaction with alkenes

Abstract

Difluorocarbene precusors 2, FSO₂CF₂COF, FSO₂CF₂CO₂H, FSO₂CF₂CO₂Me and XCF₂CO₂M react with Kl to give HCF₂l 1 in high yields; a smooth reaction of 1 with alkenes or alkynes in the presence of Na₂S₂O₄ gives the difluoromethylated adducts in good yields.