Palladium‐Catalyzed Enantioselective Heck Carbonylation with a Monodentate Phosphoramidite Ligand: Asymmetric Synthesis of (+)‐Physostigmine, (+)‐Physovenine, and (+)‐Folicanthine
作者:Ming Chen、Xucai Wang、Pengfei Yang、Xun Kou、Zhi‐Hui Ren、Zheng‐Hui Guan
DOI:10.1002/anie.202003288
日期:2020.7.13
monodentate ligand assisted Pd‐catalyzed domino Heck carbonylation reaction with CO. The highly enantioselective domino Heck carbonylation of N‐aryl acrylamides and various nucleophiles, including arylboronic acids, anilines, and alcohols, in the presence of CO was achieved. A novel monodentate phosphoramidite ligand, Xida‐Phos, has been developed for this reaction and it displays excellent reactivity
本文报道的是与CO进行的第一个对映选择性单齿配体辅助Pd催化的多米诺Heck羰基化反应。N的高对映选择性多米诺Heck羰基化反应在CO的存在下实现了‐芳基丙烯酰胺和各种亲核试剂,包括芳基硼酸,苯胺和醇。已开发出一种新颖的单齿亚磷酰胺配体Xida-Phos,它具有出色的反应性和对映选择性。该反应采用了容易获得的起始原料,可以耐受各种官能团,并可以直接进入具有β-羰基取代的全碳四元立体中心的多种对映体富集的吲哚,从而为不对称合成提供了一种简便而互补的方法生物活性六氢吡咯并吲哚及其二聚生物碱。