Preparation of polymer-supported Ru-TsDPEN catalysts and use for enantioselective synthesis of (S)-fluoxetine
作者:Yangzhou Li、Zhiming Li、Feng Li、Quanrui Wang、Fanggang Tao
DOI:10.1039/b505943g
日期:——
Polymer-supported chiral ligands 9 and 17 were prepared based on Noyori's (1S,2S)- or (1R,2R)-N-(p-tolylsulfonyl)-1,2-diphenylethylenediamine. The combination with [RuCl2(p-cymene)]2 has been shown to exhibit high activities and enantioselectivities for heterogeneous asymmetric transfer hydrogenation of aromatic ketones (19a-c) with formic acid-triethylamine azeotrope as the hydrogen donor, whereby
基于Noyori的(1S,2S)-或(1R,2R)-N-(对甲苯磺酰基)-1,2-二苯基乙二胺制备聚合物负载的手性配体9和17。与[RuCl2(p-cymene)] 2的组合已显示出高活性和对映选择性,以甲酸-三乙胺共沸物为氢供体,对芳香族酮(19a-c)进行不对称不对称转移氢化,从而提供了相应的光学异构活性醇20a-c,是手性氟西汀的关键前体。如用于底物19c的配体17所例示的,催化剂可以在三个连续的运行中被回收并重新使用,而对映选择性没有显着下降。该程序避免了有毒的过渡金属物质对氟西汀的合理污染。