Palladium-catalyzed coupling of aryl sulfonium salts with [TBA][P(SiCl3)2] for the construction of tertiary phosphines†

Abstract

We present a strategy for the synthesis of triarylphosphines via palladium-catalyzed C–P cross-coupling reactions of aryl sulfonium salts with [TBA][P(SiCl₃)₂]. This method utilizes [TBA][P(SiCl₃)₂], a phosphorus derivative of phosphoric acid, as the phosphorus source. This approach circumvents the hazards and intricate pathways associated with white phosphorus.