Enantioselective Organo-Photocatalysis Mediated by Atropisomeric Thiourea Derivatives
作者:Nandini Vallavoju、Sermadurai Selvakumar、Steffen Jockusch、Mukund P. Sibi、Jayaraman Sivaguru
DOI:10.1002/anie.201310940
日期:2014.5.26
this, organo‐photocatalysts that are based on atropisomericthioureas and display lower excited‐state energies than the reactive substrates have been developed. These photocatalysts were found to be efficient in promoting the [2+2] photocycloaddition of 4‐alkenyl‐substituted coumarins, which led to the corresponding products with high enantioselectivity (77–96 % ee) at low catalyst loading (1–10 mol %)
Palladium-catalyzed coupling reactions of 4-coumarinyl triflates with indoles leading to 4-indolyl coumarins
作者:Tao Guo、Yu Liu、Yun-Hui Zhao、Pan-Ke Zhang、Shu-Lei Han、Hong-Min Liu
DOI:10.1016/j.tetlet.2016.09.012
日期:2016.10
A convenient and efficient approach for the synthesis of 4-indolyl coumarins and 4-indolyl quinolinones was developed via palladium-catalyzedcouplingreactions between 4-coumarinyl triflates/4-trifluoromethanesulfonyloxyquinolinones and indoles. Biological evaluation revealed that some of the obtained products exhibited in vitro antiproliferative activities on human-derived prostate, stomach, lung