Direct Asymmetric Hydrogenation and Dynamic Kinetic Resolution of Aryl Ketones Catalyzed by an Iridium‐NHC Exhibiting High Enantio‐ and Diastereoselectivity
作者:Chinna Ayya Swamy P、Andrii Varenikov、Graham Ruiter
DOI:10.1002/chem.201904911
日期:2020.2.21
of ketones in excellent yields and good enantioselectivity (up to 93 % ee). Moreover, when using racemic α‐substituted ketones, excellent diastereoselectivities were obtained (dr 99:1) by dynamic kinetic resolution of the in situ formed enolate. Overall, the herein described hydrogenation occurs under ambient conditions using low hydrogen pressures, providing a direct and atom efficient method towards
据报道,手性铱卡宾-恶唑啉催化剂能够以优异的收率和良好的对映选择性(高达93%ee)直接有效地氢化多种酮 。此外,当使用外消旋α-取代的酮时,通过原位形成的烯醇化物的动态动力学拆分获得了极好的非对映选择性(dr 99:1)。总体而言,本文所述的氢化在环境条件下使用低氢压力发生,从而提供了直接且原子有效的手性仲醇方法。