Synthesis of Phenolic Coumestans via a Sequential Dehydrogenation/Oxa-Michael Addition Reaction of 2′,4′-Dihydroxyl-3-arylcoumarins
作者:Qinfang Yan、Yi Jiang、Xianheng Song、Guoqing Lu、Qianzhong Zhang、Zhibo Du、Albert S. C. Chan、Yong Zou
DOI:10.1021/acs.joc.2c00120
日期:2022.5.6
A facile and practical approach for the synthesis of natural coumestans and derivatives starting from 2′,4′-dihydroxyl-3-arylcoumarins has been developed. The process involved a seqential intramolecular dehydrogenation/oxa-Micheal reaction efficiently promoted by 1,8-diazabicyclo[5.4.0]undec-7-ene at 40 °C under metal- and ligand-free conditions with good functional group compatibility.