Chemo- and Diastereoselective Synthesis of <i>N</i>-Propargyl Oxazolidines through a Copper-Catalyzed Domino A<sup>3</sup> Reaction
作者:Yazhen Zhang、Liliang Huang、Xiaoyang Li、Le Wang、Huangdi Feng
DOI:10.1021/acs.joc.8b03244
日期:2019.5.3
Herein we describe a highly chemoselective A3-coupling/annulation of amino alcohols, formaldehyde, two kinds of aldehydes and alkynes, catalyzed by copper(II). This cascade reaction, employing readily available materials, provides a new and highly effective access to chiral N-propargyl oxazolidines with good diastereoselectivity (up to >20:1). In the case of ortho-substituted aromatic aldehydes, an
在本文中,我们描述了由铜(II)催化的氨基醇,甲醛,两种醛和炔烃的高度化学选择性的A 3偶联/环化。该级联反应采用容易获得的材料,提供了一种新的高效的手性N-炔丙基恶唑烷,其非对映异构选择性好(高达> 20:1)。在邻位取代的芳族醛的情况下,观察到令人着迷的空间效应:庞大的基团对非对映体选择性显示出不利的影响,以形成标题分子。