Catalytic Enantioselective Synthesis of α-Chiral Azaheteroaryl Ethylamines by Asymmetric Protonation
作者:Chao Xu、Calum W. Muir、Andrew G. Leach、Alan R. Kennedy、Allan J. B. Watson
DOI:10.1002/anie.201806956
日期:2018.8.27
The direct enantioselective synthesis of chiral azaheteroaryl ethylamines from vinyl‐substituted N‐heterocycles and anilines is reported. A chiral phosphoric acid (CPA) catalyst promotes dearomatizing aza‐Michael addition to give a prochiral exocyclic aryl enamine, which undergoes asymmetricprotonation upon rearomatization. The reaction accommodates a broad range of N‐heterocycles, nucleophiles, and
Enantioselective Hydrophosphination of Terminal Alkenyl Aza‐Heteroarenes
作者:Esther G. Sinnema、Tizian‐Frank Ramspoth、Reinder H. Bouma、Luo Ge、Syuzanna R. Harutyunyan
DOI:10.1002/anie.202316785
日期:2024.2.12
Stereoselective hydrophosphination of alkenes is a promising route to chiral phosphorus compounds, but the use of alkenyl-heteroarenes is challenged by their low reactivity and control of stereoselectivity. Here we present a general Mn(I)-catalysed enantioselective hydrophosphination of alkenyl aza-heteroarenes. The method was applied to a wide range of alkenyl heterocycles and provided access to a