Palladium (0 or II)-catalyzed coupling reactions have acquired a well-established status in the synthetic organic repertoire. 1 A recent survey by Farina and coworkers2 revealed that a majority of the transition metalmediated cross-coupling reactions reported in 1992 involved palladium catalysis. While most examples involve the formation of carbon-carbon bonds, palladium-catalyzed formation of carbon-silicon, carbongermanium, and carbon-tin bonds ...