Cycloaddition of Stable Disilenes to Terminal Acetylenes

摘要

Teteramesityldisilene and trans-1,2-di-t-butyl-1,2-dimesityldisilene (3) react with various 1-alkynes to give air-stable disilacyclobutenes. The cyclosaddition of 3 to alkynes produces equal amounts of both stereoisomers, consistent with a stepwise mechanism.