Manganese catalyzed enantio- and regioselective hydrogenation of α,β-unsaturated ketones using an imidazole-based chiral PNN tridentate ligand
作者:Ze Wang、Xianghua Zhao、An Huang、Zehui Yang、Yuqi Cheng、Jiachen Chen、Fei Ling、Weihui Zhong
DOI:10.1016/j.tetlet.2021.153389
日期:2021.10
enantioselective 1,2-reduction of α,β-unsaturated ketones has been achieved using a chiral pincer Mn catalyst. A series of PNN tridentate ligands containing benzimidazole groups were designed with ferrocene as the backbone, which coordinated with Mn to form the active catalyst. This mild process represents a general method to access chiral allyl alcohols with high catalytic activity (up to 9500 TON) and high enantioselectivity
使用手性钳形锰催化剂实现了α , β-不饱和酮的对映选择性 1,2-还原。以二茂铁为骨架设计了一系列含有苯并咪唑基团的PNN三齿配体,与Mn配位形成活性催化剂。这种温和的过程代表了一种获得具有高催化活性(高达 9500 TON)和高对映选择性(66-86% ee)的手性烯丙醇的通用方法。此外,该催化系统提供了大麻二酚关键药物中间体的新合成。