Stereoselective Base‐Catalyzed 1,1‐Silaboration of Terminal Alkynes

Abstract

Ab ase-catalyzed reaction that enables stereoselective 1,1-silaboration of terminal alkynes is described. This method not only offers an ew strategy to functionalize simple and readily accessible alkynes beyond 1,2-difunctionalization, but also provides an unconventional atom-and step-economical approach to rapidly and reliably access versatile geminal silylboranes in the absence of transition metals and with exquisite stereoselectivity. Scheme 1. Base-catalyzed heterodifunctionalization of terminal alkynes. Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.Scheme 4. Synthetic applicability. Scheme 5. Deuterium-labelling experiments. Scheme 6. Solvent-dependent selectivity and intermediacy of allene species.