Thermal and Catalytic Transylidations between Halonium Ylides and Synthesis and Reaction of Stable Aliphatic Chloronium Ylides

摘要

Iodonium ylides serve as excellent progenitors for generation of singlet carbenes because of the hyper-leaving group ability of aryl-λ~3-iodanyl groups. Under thermal, catalytic, or photochemical conditions, they transfer the alkylidene groups to a wide range of heteroatom nucleophiles involving nitrogen heterocycles, phos- phines, arsines, sulfides, sulfoxides, and selenides, providing a useful preparative method for pyridinium, phosphonium, and sulfonium ylides, etc.