通过基于苯并噻唑配体的金属介导的CH键活化,已经制备了几种用于亚胺和喹啉衍生物还原的C,N-螯合环金属化半三明治铱基催化剂。这些铱配合物对各种类型的亚胺的氢化显示出高催化活性。活性最高的催化剂是从甲氧基取代的配合物2获得的,对于还原亚胺6a的催化TOF值为975 h –1。另外,这些半三明治配合物还显示出对N-杂环喹啉衍生物的催化加氢的高效率。对于具有给电子或吸电子基团的各种底物显示出良好的催化活性。配合物1 - 5被完全表征通过NMR,IR和元素分析。通过X射线衍射分析进一步证实了配合物1和4的分子结构。
The present invention relates to an iridium-based catalyst compound for hydrogenating reducible moieties, especially imines and iminiums, the catalyst compounds being defined by the formula: (Formula (I)) where ring B is a conjugated ring system with one or more substituents. The catalysts of the invention are particularly effective in reductive amination procedures which involve the in situ generation of the imine or iminium under reductive hydrogenative conditions.
A cyclometallated iridium complex containing an imino ligand has been shown to catalyse the hydrogenation of imines. The catalyst is highly active and selective for imino bonds, with a wide variety of imines being hydrogenated in less than 1 hour at a substrate/catalyst (S/C) ratio of 2000 at 20 bar H2 pressure and 75 °C.
已显示含有亚氨基配体的环金属化铱络合物可催化亚胺的氢化。该催化剂具有很高的活性,对亚氨基键具有选择性,在20 bar H 2的压力和75°C下,各种亚胺在2000的底物/催化剂(S / C)比不到1小时的时间内就可以氢化。
[EN] CATALYST COMPOUNDS<br/>[FR] COMPOSÉS DE TYPE CATALYSEUR
申请人:UNIV LIVERPOOL
公开号:WO2013153408A1
公开(公告)日:2013-10-17
The present invention relates to an iridium-based catalyst compound for hydrogenating reducible moieties, especially imines and iminiums, the catalyst compounds being defined by the formula: (Formula (I)) where ring B is a conjugated ring system with one or more substituents. The catalysts of the invention are particularly effective in reductive amination procedures which involve the in situ generation of the imine or iminium under reductive hydrogenative conditions.
Palladium-N-Heterocyclic Carbene (NHC)-Catalyzed Asymmetric Synthesis of Indolines through Regiodivergent C(sp<sup>3</sup>)H Activation: Scope and DFT Study
作者:Dmitry Katayev、Evgeny Larionov、Masafumi Nakanishi、Céline Besnard、E. Peter Kündig
DOI:10.1002/chem.201403985
日期:2014.11.10
Two bulky, chiral, monodentate N‐heterocyclic carbene ligands were applied to palladium‐catalyzed asymmetricCH arylation to incorporate C(sp3)H bond activation. Racemic mixtures of the carbamate starting materials underwent regiodivergent reactions to afford different trans‐2,3‐substituted indolines. Although this CArCalkyl coupling requires high temperatures (140–160 °C), chiral induction is high
Cyclometalated Half-Sandwich Iridium Complex for Catalytic Hydrogenation of Imines and Quinolines
作者:Zi-Jian Yao、Nan Lin、Xin-Chao Qiao、Jing-Wei Zhu、Wei Deng
DOI:10.1021/acs.organomet.8b00553
日期:2018.11.12
iridium-based catalysts for imines and quinoline derivatives reduction have been prepared through metal-mediated C–H bond activation based on benzothiazole ligands. These iridium complexes exhibited high catalytic activity for hydrogenation of various types of imines with high yields. The most active catalyst was obtained from methoxyl substituted complex 2, showing the catalytic TOF value of 975 h–1 for
通过基于苯并噻唑配体的金属介导的CH键活化,已经制备了几种用于亚胺和喹啉衍生物还原的C,N-螯合环金属化半三明治铱基催化剂。这些铱配合物对各种类型的亚胺的氢化显示出高催化活性。活性最高的催化剂是从甲氧基取代的配合物2获得的,对于还原亚胺6a的催化TOF值为975 h –1。另外,这些半三明治配合物还显示出对N-杂环喹啉衍生物的催化加氢的高效率。对于具有给电子或吸电子基团的各种底物显示出良好的催化活性。配合物1 - 5被完全表征通过NMR,IR和元素分析。通过X射线衍射分析进一步证实了配合物1和4的分子结构。