Metal-free synthesis of biarenes via photoextrusion in di(tri)aryl phosphates

Abstract

A metal-free route for the synthesis of biarenes has been developed. The approach is based on the photoextrusion of a phosphate moiety occurring upon irradiation of biaryl- and triaryl phosphates. The reaction involves an exciplex as the intermediate and it is especially suitable for the preparation of electron-rich biarenes.

Keywords

• aryl phosphates
• biarenes
• metal-free synthesis
• photochemistry
• photoextrusion