<i>N</i>,<i>N</i>,<i>N</i>’,<i>N</i>’-Tetramethylethylenediamine-Enabled Photoredox-Catalyzed C–H Methylation of <i>N</i>-Heteroarenes
作者:Fang Liu、Zhi-Peng Ye、Yuan-Zhuo Hu、Jie Gao、Lan Zheng、Kai Chen、Hao-Yue Xiang、Xiao-Qing Chen、Hua Yang
DOI:10.1021/acs.joc.1c01325
日期:2021.9.3
Aiming at the valuable methylation process, readily available and inexpensive N,N,N′,N′-tetramethylethylenediamine (TMEDA) was first identified as a new methyl source in photoredox-catalyzed transformation in this work. By virtue of this simple methylating reagent, a facile and practical protocol for the direct C–H methylation of N-heteroarenes was developed, featuring mild reaction conditions, broad
针对有价值的甲基化过程,在这项工作中首次将易于获得且价格低廉的N , N , N' , N' -四甲基乙二胺(TMEDA) 确定为一种新的甲基化来源。凭借这种简单的甲基化试剂,开发了一种简便实用的N-杂芳烃直接 C-H 甲基化方案,具有反应条件温和、底物范围广和可扩展性等特点。机理研究表明,基本上涉及顺序光氧化还原、碱基辅助质子转移、碎裂和互变异构化过程。