Highly Regio- and Stereoselective Tridentate NCNN Cobalt-Catalyzed 1,3-Diyne Hydrosilylation

A highly regio- and stereoselective tridentate N C NN cobalt-catalyzed hydrosilylation of 1,3-diynes was developed. A wide range of 1,3-diynes was suitable for such transformations at room temperature, affording the corresponding silyl-functionalized 1,3-enynes in good yields within 5 min. These reactions can be readily scaled up to gram scale under mild conditions. To date, this is the most efficient cobalt catalytic system for the hydrosilylation of 1,3-diynes.