Alkenes are one of the major classes of chemical building blocks for organic synthesis. Although numerous methods exist for the preparation of alkenes, the stereoselective synthesis of tri-and tetrasubstituted [1] alkenes can still pose a significant challenge. One method that has enjoyed considerable success in this respect is the carbometalation of alkynes.[1–5] In this approach, the key issue is regioselectivity, which usually originates ...
