Metal-free visible-light-driven cascade cyclization reaction to synthesize 2-oxindoles <i>via</i> benzoyl and phenylsulfinyl radicals with acrylamide derivatives
作者:Xin Sun、Jing-Ping Zhu、Qing-Chuang Qiu、Ya-Li He、Da-Rong Hu、Xin-Ling Li、Gui-Ping Lu、Ying-Hui Yuan、Xiang-Fei Zhang、Xiaobo Xu、Miao Yu、Bin Wu
DOI:10.1039/d2ob01256a
日期:——
visible-light-driven cascade cyclization reaction to synthesize 3-methyl-3-acetophenone-2-oxindoles and 3-methyl-3-(methylsulfonyl)benzene-2-oxindoles in yields up to 96% and 99%, via benzoyl and phenylsulfinyl radicals with acrylamide derivatives is reported, respectively. Extensive studies, including gram-scale, radical capture and isotope experiments, were performed to indicate that the reaction may involve a radical
无金属可见光驱动的级联环化反应合成 3-甲基-3-苯乙酮-2-羟吲哚和 3-甲基-3-(甲基磺酰基)苯-2-羟吲哚的产率高达 96% 和 99%,分别报道了通过苯甲酰基和苯亚磺酰基自由基与丙烯酰胺衍生物。进行了广泛的研究,包括克级、自由基捕获和同位素实验,以表明该反应可能涉及自由基过程。