Catalyst-Free Visible Light-Induced N−N Bond Cleavage for the Synthesis of Iminophosphorane Using Triarylphosphine and N-Sulfonyl and N-Acylaminopyridinium Salt

Abstract

Herein, we explore a visible light-enabled radical addition for the construction of N-sulfonyl and N-acyliminophosphorane using triarylphosphine and N-sulfonyl and N-acylaminopyridinium salts in the absence of transition metal, photocatalyst, oxidant or base. This method employs PAr₃ as both the reaction catalyst to promote the generation of amidyl radical via N−N bond cleavage of N-sulfonyl and N-acylaminopyridinium salts, and materials for the preparation of N-sulfonyl and N-acyliminophosphorane products. This transformation exhibits abroad substrate scope and good functional group compatibility.