Visible-Light-Driven, Photoredox-Catalyzed Cascade of <i>ortho-</i>Hydroxycinnamic Esters To Access 3-Fluoroalkylated Coumarins
作者:Dan Song、Chao-Ming Wang、Zhi-Peng Ye、Peng-Ju Xia、Zhi-Xiong Deng、Jun-An Xiao、Hao-Yue Xiang、Hua Yang
DOI:10.1021/acs.joc.9b00715
日期:2019.6.7
A general and straightforward protocol for di-/perfluoroalkylation of ortho-hydroxycinnamic esters via a photoredox-catalyzed cascade was developed to access a variety of 3-fluoroalkylated coumarins. This method was characterized by all-in-one synthetic design, simplified operation, mild reaction conditions, and broad substrate scope. Moreover, a sequential one-pot procedure starting from commercially available salicylaldehyde was also successfully realized to synthesize 3-fluoroalkylated coumarins.
Visible-Light-Driven, Photocatalyst-Free Cascade to Access 3-Cyanoalkyl Coumarins from <i>ortho</i>-Hydroxycinnamic Esters