Transformation of O2S(CCCMe3)2 to an exoalkylidene thiete 1,1-dioxide ligand by Pt-H addition and rearrangement reactions

Abstract

Addition of a Pt-H bond to the CC bond of an alkynyl substituent of a dialkynylsuiphone occurs regioselectively to give an exoalkylidene thiete 1, 1-dioxide ligand following a subsequent insertion and rearrangement of the second alkynyl substituent; a proposed mechanism for the unusual formation of the heterocyclic ligand is presented.