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 %)
[EN] 2-AMINOQUINOLINES AS MELANIN CONCENTRATING HORMONE RECEPTOR ANTAGONISTS<br/>[FR] 2-AMINOQUINOLINES SERVANT D'ANTAGONISTES DE RECEPTEUR DE L'HORMONE DE CONCENTRATION DE MELANINE
申请人:ABBOTT LAB
公开号:WO2003105850A1
公开(公告)日:2003-12-24
The present invention is related to compounds of formula (I), or a therapeutically suitable salt or prodrug thereof, which antagonize the effects of melanin-concentrating hormone (MCH) through the melanin concentrating hormone receptor and are useful for the prevention or treatment of eating disorders, weight gain and obesity.
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
Copper-catalyzed chalcogenation of imidazoheterocycles with sulfur/selenium powder and coumarinyl triflates
作者:Tao Guo、Xu-Ning Wei、Hong-Yan Wang、Ying-Li Zhu、Yun-Hui Zhao、Yong-Cheng Ma
DOI:10.1039/c7ob02278f
日期:——
An efficient and convenient copper-catalyzed chalcogenation of imidazoheterocycles with sulfur/selenium powder and coumarinyl triflates has been described. This procedure provides a wide range of structurally diverse coumarinylthio-/coumarinylseleno-substituted imidazoheterocycles in good yields and with good functional group tolerance. Biological evaluation showed that the newly synthesized compound