Copper-Catalyzed Aerobic Oxidative [2 + 3] Cyclization/Aromatization Cascade Reaction: Atom-Economical Access to Tetrasubstituted 4,5-Biscarbonyl Imidazoles
作者:Jialin Xie、Yuanqiong Huang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.7b02767
日期:2017.11.17
An atom-economical method for accessing tetrasubstituted 4,5-biscarbonylimidazoles by reaction between glycine derivatives and 5-alkoxyoxazoles is reported. The method, which involves a copper-catalyzed aerobic oxidative [2 + 3] cyclization/aromatization cascade process, starts from readily available and inexpensive materials, uses molecular oxygen as a co-oxidant, and has a broad substrate scope.
报道了通过甘氨酸衍生物和5-烷氧基恶唑之间的反应获得四取代的4,5-双羰基咪唑的原子经济方法。该方法涉及铜催化的好氧氧化[2 + 3]环化/芳香化反应级联过程,从容易获得且廉价的材料开始,使用分子氧作为助氧化剂,具有广泛的底物范围。