Catalyst-Free, Direct Electrochemical Tri- and Difluoroalkylation/Cyclization: Access to Functionalized Oxindoles and Quinolinones
作者:Zhixiong Ruan、Zhixing Huang、Zhongnan Xu、Guangquan Mo、Xu Tian、Xi-Yong Yu、Lutz Ackermann
DOI:10.1021/acs.orglett.9b00361
日期:2019.2.15
The catalyst-free electrochemical di- and trifluoromethylation/cyclization of N-substituted acrylamides was realized under external oxidant-free conditions. The strategy provides expedient access to fluoroalkylated oxindoles and 3,4-dihydroquinolin-2(1H)-ones with ample scope and broad functional group tolerance by mild, direct electrolysis of sodium sulfinates in an undivided cell. Detailed mechanistic
N-取代的丙烯酰胺的无催化剂电化学二和三氟甲基化/环化反应在无外部氧化剂的条件下实现。该策略通过在未分开的电池中进行亚硫酸钠的温和直接电解,方便地获得了具有足够范围和宽泛官能团耐受性的氟代烷基化羟吲哚和3,4-二氢喹啉-2(1 H)-酮。详细的机械研究为基于SET的反应歧管提供了有力的支持。