Photoredox Catalysis-Enabled C–H Difluoromethylation of Heteroarenes with Pentacoordinate Phosphorane as the Reagent
作者:Huanhuan Song、Jingwen Li、Yinbin Zhang、Ke Chen、Le Liu、Junjie Zhang、Xin-Hua Duan、Mingyou Hu
DOI:10.1021/acs.joc.3c01336
日期:2023.8.18
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。