Copper-Catalyzed Asymmetric Reductions of Aryl/Heteroaryl Ketones under Mild Aqueous Micellar Conditions
作者:David M. Fialho、Elham Etemadi-Davan、Olivia C. Langner、Balaram S. Takale、Amol Gadakh、Ganesh Sambasivam、Bruce H. Lipshutz
DOI:10.1021/acs.orglett.1c00746
日期:2021.5.7
Enantioselective syntheses of nonracemic secondary alcohols have been achieved in an aqueous micellar medium via copper-catalyzed (Cu(OAc)2·H2O/(R)-3,4,5-MeO-MeO-BIPHEP) reduction of aryl/heteroaryl ketones. This methodology serves as a green protocol to access enantio-enriched alcohols under mild conditions (0–22 °C) using a base metal catalyst, together with an inexpensive, innocuous, and convenient
非消旋仲醇的对映选择性合成已通过铜催化的(Cu(OAc)2 ·H 2 O /(R)-3,4,5-MeO-MeO-MePH-BIPHEP)还原芳基/杂芳基在胶束水溶液中实现酮。这种方法学是一种绿色的方案,可使用贱金属催化剂以及廉价,无害且方便的化学计量氢化物源(PMHS)在温和的条件下(0-22°C)获取对映体富集的醇。形成的仲醇产品的收率好至极好,ee值大于90%。