Palladium-Catalyzed Regio- and Stereoselective Cross-Coupling of Baylis-Hillman Adducts and Bimetals:  A Novel Method for the Synthesis of Substituted Allylsilanes and Allylgermanes

Cross-coupling reactions between Baylis-Hillman acetate adducts and bimetallic reagents (Si−Si, Ge−Ge) catalyzed by a phosphine-free palladium complex are described. 3-Substituted-2-carbonylallylsilanes and allylgermanes were isolated in high yields. The cross-coupling reactions are regio- and stereoselective.