broad applications in numerous bioactive molecules. Herein, we report photoredox catalysis-induced direct C–H difluoromethylation of heterocycles by using bis(difluoromethyl) pentacoordinate phosphorane (PPh3(CF2H)2, 1) as the reagent. A variety of heterocycles, such as quinoxalin-2(1H)-one, thiophene, indole, and coumarin, are readily tailored with a difluoromethyl group. The method is featured as transition-metal-free
二
氟甲基化
杂环化合物已在众多
生物活性分子中得到广泛应用。在此,我们报道了使用双(二
氟甲基)五配位正膦(PPh 3 (CF 2 H) 2 , 1)作为试剂,光氧化还原催化诱导杂环的直接C-H二
氟甲基化。多种
杂环化合物,例如
喹喔啉-2(1H ) -酮、
噻吩、
吲哚和
香豆素,很容易用二
氟甲基进行定制。该方法以有机化合物
赤藓红B为催化剂,O 2为氧化剂,具有无过渡
金属的特点。