Palladium-catalyzed cross-coupling reactions of silanolates: A paradigm shift in silicon-based cross-coupling reactions

This paper chronicles the conceptual development, proof of principle experiments, and recent advances in the palladium-catalyzed cross-coupling reactions of the conjugate bases of organosilanols. The discovery that led to the design and refinement of this process represents a classical illustration of how mechanistic studies can provide a fertile ground for the invention of new reactions. On the basis of a working hypothesis (which ultimately proved to be incorrect) and the desire to effect silicon-based cross-coupling without the agency of fluoride activation, a mild and practical palladium-catalyzed cross-coupling of alkenyl-, aryl-, and heteroar-yl silanolates has been developed. The mechanistic underpinninas, methodological extensions, and the successful applications of this technology to the synthesis of complex molecules are described.