Rh-Catalyzed Conjugate Addition of Arylzinc Chlorides to Thiochromones: A Highly Enantioselective Pathway for Accessing Chiral Thioflavanones
作者:Ling Meng、Ming Yu Jin、Jun Wang
DOI:10.1021/acs.orglett.6b02453
日期:2016.10.7
A highly efficient asymmetric synthesis of chiral thioflavanones is developed via conjugate addition of arylzinc reagents to thiochromones using Rh(COD)Cl2/(R)-3,4,5-MeO-MeOBIPHEP catalyst. This method overcomes catalyst poisoning and substrate inertness and affords a series of chiral thioflavanones (2-arylthiochroman-4-ones) in good yields (up to 91% yield) with excellent ee values (up to 97% ee)
通过使用Rh(COD)Cl 2 /(R)-3,4,5-MeO-MeOBIPHEP催化剂将芳基锌试剂共轭添加到硫代色酮中,开发了一种高效的手性硫代黄酮酮的不对称合成方法。此方法克服了催化剂中毒和底物惰性的问题,并以良好的收率(最高91%的收率)和优异的ee值(最高ee的97%)提供了一系列手性硫代黄烷酮(2-芳基硫代色烷-4-酮)。既定的不对称合成为进一步的药物研究铺平了道路。