Catalytic Asymmetric Carbonylation of Prochiral Sulfonamides via C–H Desymmetrization
作者:Xing-Feng Bai、Qiu-Chao Mu、Zheng Xu、Ke-Fang Yang、Li Li、Zhan-Jiang Zheng、Chun-Gu Xia、Li-Wen Xu
DOI:10.1021/acscatal.8b04725
日期:2019.2.1
An enantioselective oxidative C–H/N–H carbonylation process was developed in this work. A bimetallic Pd/Cu-based catalyst system was found to catalyze enantioselective C(sp2)–H carbonylation of prochiral arylsulfonamides via desymmetrization process in the presence of mono-N-protected amino acid ligands. This reaction provides a facile strategy to the stereoselective construction of the lactam-type
在这项工作中开发了一种对映选择性的氧化CH / NH羰基化过程。发现基于双金属Pd / Cu的催化剂体系在单氮原子保护的氨基酸配体存在下,通过去对称化过程催化前手性芳基磺酰胺的对映选择性C(sp 2)-H羰基化。该反应为内酰胺型产物如异吲哚啉-1-酮和异喹啉-1-酮的立体选择性构建提供了简便的策略,该产物在气球压力下与CO / O 2的混合物具有良好的收率和对映选择性。通过使用密度泛函理论(DFT)的研究合理化了反应机理。