Reactions of Iodinated Vinylidene Complexes Generated from 1-Iodo-1-alkynes and W(CO)5(thf)

Abstract
We have succeeded in generating iodinated tungsten vinylidene complexes from 1-iodo-1-alkynes and W(CO)5(thf), and have employed these complexes for two types of synthetically useful reactions, that is, 6π-electrocyclization for o-(iodoethynyl)styrenes and endo-selective cyclization for ω-iodoacetylenic silyl enol ethers.