Highly Enantioselective Hydrogenation of Non-<i>ortho</i>-Substituted 2-Pyridyl Aryl Ketones via Iridium-<i>f</i>-Diaphos Catalysis
作者:Sanfei Nian、Fei Ling、Jiachen Chen、Ze Wang、Haiwei Shen、Xiao Yi、Yun-Fang Yang、Yuanbin She、Weihui Zhong
DOI:10.1021/acs.orglett.9b01415
日期:2019.7.19
This work disclosed a highly enantioselective hydrogenation of non-ortho-substituted 2-pyridyl aryl ketones via Ir/f-diaphos catalysis. This catalytic system allows for full control over the configuration of the stereocenter, affording two enantiomers of the desired products with extremely high enantioselectivity (up to >99% ee in most cases) and excellent reactivity (TON of up to 19600, TOF of 1633
该工作公开了通过Ir / f-重氮磷催化非对位取代的2-吡啶基芳基酮的高度对映选择性氢化。该催化系统可完全控制立体中心的构型,提供所需产物的两种对映异构体,具有极高的对映选择性(在大多数情况下,最高可达> 99%ee)和出色的反应性(TON可达19600,TOF为1633 h)–1)在温和的条件下。密度泛函理论计算和控制实验表明,溶剂异丙醇,底物和配体之间的氢键中继对于高ee至关重要。