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 heterocyclicN-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