Stereospecific Asymmetric Synthesis of Tertiary Allylic Alcohol Derivatives by Catalytic [2,3]‐Meisenheimer Rearrangements
作者:Xin Yu、Nick Wannenmacher、René Peters
DOI:10.1002/anie.202001725
日期:2020.6.26
Chiral acyclic tertiary allylic alcohols are very important synthetic building blocks, but their enantioselective synthesis is often challenging. A major limitation in catalytic asymmetric 1,2‐addition approaches to ketones is the enantioface differentiation by steric distinction of both ketone residues. Herein we report the development of a catalytic asymmetric Meisenheimer rearrangement to overcome
手性无环叔烯丙基醇是非常重要的合成基石,但其对映选择性合成通常具有挑战性。酮的催化不对称1,2-加成方法的主要局限性是通过两个酮残基的空间区别来区分对映体。本文中,我们报道了催化不对称迈森海默重排技术的发展,以克服该问题,因为它以立体定向方式进行。这也允许高对映选择性形成产物,其中所产生的四取代的立体中心的残基显示出类似的空间需求。发现低的催化剂负载量是足够的,并且反应条件温和到足以耐受甚至高反应性的官能团,例如可烯化的醛,伯甲苯磺酸酯或环氧化物。