Metal-Free, Regioselective, Dehydrogenative Cross-Coupling between Formamides/Aldehydes and Coumarins by C-H Functionalization
作者:Mohit Gupta、Prashant Kumar、Vijay Bahadur、Krishan Kumar、Virinder S. Parmar、Brajendra K. Singh
DOI:10.1002/ejoc.201701764
日期:2018.2.21
A general methodology for the regioselective C‐3 functionalization of coumarins and azacoumarins by using formamides and aldehydes has been achieved in a single step with tert‐butyl peroxybenzoate as a radical initiator. This methodology provides a convenient and cost‐effective route to the products under metal‐free conditions with excellent regioselectivity and wide substrate scope.
以过氧苯甲酸叔丁酯为自由基引发剂,只需一步即可实现使用甲酰胺和醛类对香豆素和氮杂香豆素进行区域选择性C-3官能化的通用方法。这种方法为无金属条件下的产品提供了便捷且经济高效的途径,具有出色的区域选择性和广泛的底物范围。