A novel and straightforward intramolecular cyclization of glycine derivatives to 2-substituted benzoxazoles through copper-catalyzed oxidative C–H/O–H cross-coupling was described. A variety of glycine derivatives involving short peptides underwent cross-dehydrogenative-coupling readily to afford diverse 2-substituted benzoxazoles. The synthetic method has the advantages of simple operation, broad
Visible‐Light‐Induced Aerobic Oxidative C
<i>sp</i>
<sup>3</sup>
−H Functionalization of Glycine Derivatives for 2‐Substituted Benzoxazoles
作者:Zhi‐Qiang Zhu、Shan Liu、Zhi‐Yu Hu、Zong‐Bo Xie、Juan Tang、Zhang‐Gao Le
DOI:10.1002/adsc.202100134
日期:2021.5.18
Csp3−H functionalization reaction of glycine derivatives by visible-light photoredox catalysis. A wide range of glycine derivatives readily undergo the oxidative cyclization to afford various 2-substituted benzoxazoles. Importantly, this photocatalytic intramolecular dehydrogenative coupling reaction allows for the C−H functionalization of glycine derivatives involving short peptides under mild conditions