the phosphorus-centered radical-initiated transformations remain largely elusive. Herein, visible-light photoredox catalytic regioselective radical hydrophosphinylation of 1,3-enynes with diaryl phosphine oxides as phosphinoyl radical precursors has been realized. This protocol features mild conditions, a wide substrate scope, and good functional group tolerance, producing a diverse range of phosphinoyl-substituted
1,3-
烯炔的自由基1,4-官能化已成为合成多取代
丙二烯的有力策略。然而,以
磷为中心的自由基引发的转变在很大程度上仍然难以捉摸。在此,以二芳基
氧化膦作为膦酰基自由基前体,实现了 1,3-
烯炔的可见光光
氧化还原催化区域选择性自由基
氢膦酰化。该方案具有条件温和、底物范围广、官能团耐受性好的特点,能够以中等至良好的产率和高原子经济性产生多种膦酰基取代的
丙二烯。详细的机理实验揭示了反应中的自由基-极性交叉过程。