Regioselective Cu-Catalyzed Hydrosilylation of Internal Aryl Alkynes

Construction of vinylsilane building blocks is important for advancing the synthesis of complex small molecules and natural products. Herein, we report a highly regio- and stereoselective copper-catalyzed hydrosilylation of unsymmetrical internal aryl alkynes. The reaction is performed across a broad scope of internal aryl alkynes, providing exclusive access to α-vinylsilane alkenyl arene products, including several silylated small molecule drug analogs.