Confronting the Challenge of Asymmetric Carbonyl Addition to Sterically Bulky Isatins: Upgrading Dirhodium(II)/Biphosphine Catalytic System
作者:Wenjing Guo、Shuming Zhan、Han Yang、Zhenhua Gu
DOI:10.1021/acs.orglett.3c01028
日期:2023.5.12
Catalytic asymmetric addition of arylboronic acids to ketones is a powerful transformation for directly delivering chiral tertiary alcohols. However, there is no successful example of enantioselective addition to steric bulky isatins, which contain bulky substituent at the 4-position. To confront this challenge, in this work a dirhodium/(BTFM-Garphos) system was developed that showed extremely high
将芳基硼酸催化不对称加成到酮是一种直接提供手性叔醇的强大转化。然而,没有成功的对映选择性加成到空间庞大的靛红,其中在 4 位包含庞大的取代基。为了应对这一挑战,在这项工作中开发了二铑/(BTFM-Garphos) 系统,该系统显示出极高的活性和立体选择性,反应通常在几分钟内完成。