Amine-Catalyzed Cascade Synthesis of 3,4-Diunsubstituted Coumarins
作者:Jia Wei、Pengcheng Wang、Qianfa Jia、Jiaoyao Huang、Zhiyun Du、Kun Zhang、Jian Wang
DOI:10.1002/ejoc.201300538
日期:2013.7
We disclose an efficient route to synthesize 3,4-diunsubstitutedcoumarins through a cascade organocatalytic reaction. The reaction is catalyzed by using of a combination of benzylamine (10 mol-%) and triethylamine (10 mol-%). Various salicylaldehydes were tested, and the corresponding coumarin products were obtained in good to high yields under mild and metal-free reaction conditions.