Michael type addition of halides to alkynyl (phenyl) iodonium tetrafluoroborates. Stereoselective synthesis of (Z)-β-halovinyl (phenyl) iodonium halides
…, K Uemura, K Oshima, Y Masaki, M Kunishima, S Tani
Abstract Michael type addition of halide ions (Cl− and Br−) to alkynyl (phenyl)-iodonium tetrafluoroborates (1) under acidic conditions proceeds in a completely stereoselective manner and affords (Z)-β-halovinyl (phenyl) iodonium halides (2), potential progenitors for generating α-haloalkylidenecarbenes, in high yields.