Direct Synthesis of Dibenzophospholes from Biaryls by Double C-P Bond Formation via Phosphenium Dication Equivalents

Article abstract of DOI:10.1021/acs.orglett.0c00944

We have developed a new strategy for the generation of phosphenium dication equivalents from readily available phosphinic acids and Tf₂O. The in situ-generated dication equivalents can be readily coupled with simple (hetero)biaryls to form the corresponding dibenzophospholes directly. This protocol can also be applied to the concise synthesis of six- A nd seven-membered phosphacycles as well as the largely ?-extended heteroacene derivatives, which are of great interest in the field of organic functional materials.