Enantio- and Diastereoselective Double Mannich Reaction between Ketones and Imines Catalyzed by Zn-ProPhenol
作者:Barry M. Trost、Elumalai Gnanamani
DOI:10.1021/acs.orglett.0c00318
日期:2020.2.21
Herein we present a Zn-ProPhenol-catalyzed double Mannich reaction between ynones and imines that generates 1,3-diamines in excellent yield as well as diastereo- and enantioselectivity (>99.5% ee). With 2.2 equiv of a single imine electrophile, we obtain pseudo-symmetrical diamines whereas, with two different imine partners, we obtain unsymmetrically substituted 1,3-diamines with three contiguous stereocenters
在本文中,我们提出了炔酮与亚胺之间的锌-苯酚催化的双曼尼希反应,该反应以极好的收率以及非对映和对映选择性(> 99.5%ee)生成1,3-二胺。使用2.2当量的单个亚胺亲电试剂,我们获得了假对称的二胺,而使用两个不同的亚胺伙伴,我们获得了具有三个连续立体中心的不对称取代的1,3-二胺。此外,我们通过将1,3-二胺基序转变为多种有趣的产品来展示这些曼尼希双加合物的效用。