Electrosynthesis of 2-Substituted Benzoxazoles via Intramolecular Shono-Type Oxidative Coupling of Glycine Derivatives
作者:Lei Liu、Zhenhui Xu、Tao Liu、Chao Xu、Wangqin Zhang、Xiangqi Hua、Fei Ling、Weihui Zhong
DOI:10.1021/acs.joc.2c00856
日期:2022.9.2
Herein, an atom-economical and eco-friendly electrochemical oxidation/cyclization of glycine derivatives through intramolecular Shono-type oxidative coupling is disclosed, leading to a variety of 2-substituted benzoxazoles in 51–85% yields. This oxidative cyclization proceeded in transition metal- and oxidant-free conditions and generated H2 as only a byproduct. Additionally, gram-scale reactions and
在此,公开了一种通过分子内 Shono 型氧化偶联对甘氨酸衍生物进行原子经济且环保的电化学氧化/环化,从而以 51-85% 的收率生成多种 2-取代苯并恶唑。这种氧化环化在无过渡金属和无氧化剂的条件下进行,并产生 H 2作为副产物。此外,克级反应和广泛的底物范围证明了该协议的合成有用性。