Phototriggered Fluoroalkylation/Cyclization of Unactivated 1-Acryloyl-2-cyanoindoles: Synthesis of RCOCF<sub>2</sub>-Substituted Pyrrolo[1,2-<i>a</i>]indolediones
作者:Weixian Lv、Pengyuan Yang、Jinwei Yuan、Jiayi Li、Mengran Liang、Yitong Liu、Dongliang Xing、Liangru Yang
DOI:10.1021/acs.joc.3c02986
日期:2024.3.1
A photochemical approach toward RCOCF2-substituted pyrrolo[1,2-a]indolediones was developed by the radical cascade difluoroalkylation/cyclization reaction of unactivated 1-acryloyl-2-cyanoindoles with ethyl iododifluoroacetate or iododifluoramides under visible-light irradiation. This transition-metal- and photosensitizer-free protocol afforded diverse difluoroalkylated pyrrolo[1,2-a]indolediones in
通过未活化的1-丙烯酰基-2-氰基吲哚与碘二氟乙酸乙酯或碘二氟酰胺在可见光照射下的自由基级联二氟烷基化/环化反应,开发了一种制备RCOCF 2 -取代的吡咯并[ 1,2 -a]吲哚二酮的光化学方法。这种不含过渡金属和光敏剂的方案在温和的反应条件下以中等至良好的收率提供了多种二氟烷基化吡咯并[1,2- a ]吲哚二酮。最吸引人的是,该反应可以在阳光照射下顺利进行,这为二氟烷基化吡咯并[1,2- a ]吲哚二酮开辟了一条新途径。