Novel Synthesis of l,4-Dioxy-l,3-dienes by the Reaction of Silylated Propargyltungstens with Aldehydes

摘要

Silylated propargyltungstens generated by the addition of alkynyllithiums to Fischer-type silyl carbene complexes react with aldehydes to give l,4-dioxy-l,3-dienes in good yield.VT NMR study and deuterium labeling experiments revealed that sequential nucleophilic addition to aldehyde with 1,2-tungsten migration,1,4-hydride shift and 1,5-silyl migration is occurring in this reaction.