Recent Advances in Radical Reactions of 1,n-Enynes with Phosphorus-Centered Radicals

Organophosphorus compounds have been widely used as achiral and chiral ligands in organic synthesis (PPh₃, BINAP, dppe, Duphos, Xantphos, PPFA, Chiraphos, SEGPHOS), flame retardants, functional materials (LED, PV), as well as agrochemicals and medicines due to their broad biological activities. As the privileged versatile building blocks, 1,n-enynes have been successfully applied in the synthesis of various functionalized cyclic compounds based on their two active unsaturated chemical bonds (C═C double and C≡C triple bonds). With the development of highly selective and efficient methods in organic chemistry, various organophosphorus cyclic compounds synthesis through radical cascade strategy has attracted considerable attention in recent years. In here, we have summarized the recent main achievements in the radical cascade reactions of 1,n-enynes with phosphorus-centered radicals. Furthermore, we also displayed the detailed reaction mechanisms in this review.