Practical Synthesis of Polysubstituted Haloimidazoles from 1,1-Dibromoalkenes and Amidines
作者:Yibiao Li、Liang Cheng、Yan Shao、Shaohua Jiang、Jialing Cai、Ning Qing
DOI:10.1002/ejoc.201500305
日期:2015.7
The copper-catalyzed cycloamination reaction of 1,1-dibromoalkenes with amidines affords a diverse set of polysubstituted haloimidazole derivatives. By using this strategy, high regio- and chemoselectivity has been achieved, using 4,7-diphenyl-1,10-phenanthroline as ligand without the addition of expensive catalysts to provide moderate to good yields.
铜催化的 1,1-二溴烯烃与脒的环胺化反应提供了多种多取代的卤代咪唑衍生物。通过使用这种策略,实现了高区域选择性和化学选择性,使用 4,7-二苯基-1,10-菲咯啉作为配体,无需添加昂贵的催化剂,以提供中等至良好的产率。