Direct Synthesis of Triarylethynylphosphines from White Phosphorus and Arylacetylidene Lithiums

to generate triarylselenophosphine intermediates. Subsequent stoichiometric coupling with arylalkynyl lithiums affords the target triarylethynylphosphines. The transformation proceeds efficiently under ambient conditions using commercially available materials, obviating toxic chlorination steps. The protocol exhibits a broad substrate scope, successfully incorporating diverse arenes and heterocycles such as naphthalene, anthracene, phenanthrene, thiophene, and ferrocene.