Alkynyl Cinchona Catalysts affect Enantioselective Trifluoromethylation for Efavirenz under Metal-Free Conditions
作者:Satoshi Okusu、Kazuki Hirano、Yoshimasa Yasuda、Junki Tanaka、Etsuko Tokunaga、Haruhiko Fukaya、Norio Shibata
DOI:10.1021/acs.orglett.6b02807
日期:2016.11.4
Efavirenz is manufactured worldwide, and its asymmetric synthesis requires a complex organometallic approach, while an organocatalytic approach is far less efficient. The first highly enantioselective approach is disclosed for the synthesis of Efavirenz under nonmetal organocatalysis with up to 93% ee for the Merck intermediate and 91% ee for the Lonsa intermediate using novel alkynyl cinchona catalysts
Efavirenz在世界范围内生产,其不对称合成需要复杂的有机金属方法,而有机催化方法的效率要低得多。公开了第一种高度对映选择性的方法,该方法在非金属有机催化下使用新型炔基金鸡纳催化剂合成依夫韦伦,对于默克中间体,ee高达93%ee;对伦萨中间体,91%ee。