Asymmetric Synthesis of Propargylic α-Stereogenic Tertiary Amines by Reductive Alkynylation of Tertiary Amides Using Ir/Cu Tandem Catalysis
作者:Toolika Agrawal、Kimberly D. Perez-Morales、Jermaine A. Cort、Joshua D. Sieber
DOI:10.1021/acs.joc.2c00131
日期:2022.5.6
The development of an asymmetric protocol for the reductive alkynylation of amides to access important α-stereogenic tertiary propargylic amines is reported using a tandem Ir-catalyzed hydrosilylation/enantioselective Cu-catalyzed alkynylation. The reaction utilizes a Cu/PyBox catalyst system in the alkynylation step to achieve asymmetry and affords excellent yields with moderate to good levels of
据报道,使用串联 Ir 催化的氢化硅烷化/对映选择性 Cu 催化的炔基化,开发了一种不对称方案,用于酰胺的还原炔基化以获取重要的 α-立体异构叔炔丙基胺。该反应在炔基化步骤中使用 Cu/PyBox 催化剂体系来实现不对称性,并在使用低 Ir 催化剂负载量 (0.5 mol%) 的同时提供出色的产率和中等至良好的对映体控制水平。