C2-Selective C–H Methylation of Heterocyclic <i>N</i>-Oxides with Sulfonium Ylides
作者:Won An、Su Bin Choi、Namhoon Kim、Na Yeon Kwon、Prithwish Ghosh、Sang Hoon Han、Neeraj Kumar Mishra、Sangil Han、Sungwoo Hong、In Su Kim
DOI:10.1021/acs.orglett.0c03403
日期:2020.11.20
A redox-neutral C2-selective methylation of heterocyclic N-oxides with sulfonium ylides is described herein. This report presents unprecedented findings for the utility of sulfonium ylides as the methylation source of N-heterocycles beyond the Corey–Chaykovsky reaction. Intriguingly, pyrrolidine plays a significant role in minimizing the reductive C2-methylation process. This method is characterized
本文描述了杂环N-氧化物与氧化yl的氧化还原中性C 2-选择性甲基化。这份报告提出了前所未有的发现,发现叶立德作为Corey-Chaykovsky反应之外的N-杂环的甲基化来源。有趣的是,吡咯烷在最小化还原性C2-甲基化过程中起着重要作用。该方法的特点是条件温和,简单且具有出色的位点选择性。复杂药物分子的后期甲基化和顺序转化证明了所开发方案的适用性。