Copper‐Catalyzed Cope‐Type Hydroamination of Nonactivated Olefins toward Cyclic Nitrones: Scope, Mechanism, and Enantioselective Process Development
作者:Mengru Zhang、Shuang Liu、Hexin Li、Yajing Guo、Na Li、Meihui Guan、Haroon Mehfooz、Jinbo Zhao、Qian Zhang
DOI:10.1002/chem.201902683
日期:2019.9.25
remains underdeveloped. Herein we report the copper-catalyzed Cope-type hydroamination of oximes with pendant nonactivated olefins, which enables facile access to a series of five- and six-membered cyclic nitrones under mild conditions. In this study, heterocycle-tethered oximes were employed in the Cope-type hydroamination reaction for the first time. High enantioselectivity was achieved for carbon-tethered
环状硝酮的催化合成,对于合成化学和相关领域而言是重要的功能分子类型,但仍未得到开发。在本文中,我们报告了铜与悬垂的非活化烯烃进行肟的铜催化的Cope型加氢胺化反应,这使得在温和条件下易于获得一系列五元和六元环状硝酮。在这项研究中,第一次将杂环系肟用于Cope型加氢胺化反应。碳连接的γ,δ-乙烯基肟实现了高对映选择性,从而提供了对映体富集的五元环硝酮。初步机理研究的结果表明,在大温度范围内,单核催化物种和统一的催化途径。