Highly Z-Selective Asymmetric Conjugate Addition of Alkynones with Pyrazol-5-ones Promoted by N,N′-Dioxide-Metal Complexes
作者:Zhen Wang、Zhenling Chen、Sha Bai、Wei Li、Xiaohua Liu、Lili Lin、Xiaoming Feng
DOI:10.1002/anie.201109130
日期:2012.3.12
Highly selective: The title reaction is achieved with high enantiomeric and geometric control and thermodynamically unstable (Z)‐enone derivatives are obtained as the major products (see scheme). The procedure tolerates a wide range of substrates to generate optically active pyrazolones with vinyl‐substituted quaternary stereocenters.
高度选择性:通过高度对映体和几何控制可实现标题反应,并获得热力学不稳定的(Z)-烯酮衍生物作为主要产物(参见方案)。该程序可耐受各种底物,以产生具有乙烯基取代的季立体中心的旋光吡唑啉酮。