摘要 已经开发了一系列有效的催化系统来控制 α-酮酯与硝基烯烃共轭加成的双重对映选择性。使用手性二胺 (1 S ,1' S )-1,1'-双异二氢吲哚作为手性配体,以 (Cu(OAc) 2 ·H 2 O 或 Ni(OAc) 2 ·4H 2 O 为催化剂)以高水平的对映选择性(94% ee vs 93% ee)轻松获得由共轭加成反应产生的各个对映异构体。此外,使用 Cu(OAc) 2 ·H 2 O 作为金属中心允许对映选择性通过调节手性二胺配体的刚性(94% ee vs 94% ee)来切换共轭加成反应。
A Ruthenium Catalyst with Simple Triphenylphosphane for the Enantioselective Hydrogenation of Aromatic Ketones
作者:Han Zhou、Hanmin Huang
DOI:10.1002/cctc.201300080
日期:2013.8
An efficient Ru catalyst constructed from simple and commercially available triphenylphosphane and enantiopure (1S,1′S)‐1,1′‐biisoindoline (BIDN) was applied to the asymmetric hydrogenation of aromatic ketones. A range of simple aromatic ketones could be hydrogenated with good to excellent enantioselectivities (up to 95 % ee). An appropriate enantioselective transition state was proposed to explain