First examples of a facile hydroselenophosphorylation of alkenes are reported. Radical addition of secondary phosphine selenides to alkenes proceeds under ultraviolet irradiation to afford the corresponding anti-Markovnikov adducts regiospecifically in up to 96% yield; this thus represents a general, efficient, and atom-economical synthesis of tertiary phosphine selenides.
radical reactions - hydroselenophosphorylation - alkenes - selenium - phosphorus