Mechanistic Complexity of Asymmetric Transfer Hydrogenation with Simple Mn–Diamine Catalysts
作者:Robbert van Putten、Georgy A. Filonenko、Angela Gonzalez de Castro、Chong Liu、Manuela Weber、Christian Müller、Laurent Lefort、Evgeny Pidko
DOI:10.1021/acs.organomet.9b00457
日期:2019.8.26
The catalytic asymmetric transfer hydrogenation (ATH) of ketones is a powerful methodology for the practical and efficient installation of chiral centers. Herein, we describe the synthesis, characterization, and catalytic application of a series of manganese complexes bearing simple chiral diamine ligands. We performed an extensive experimental and computational mechanisticstudy and present the first
酮的催化不对称转移氢化(ATH)是实用且高效安装手性中心的强大方法。在此,我们描述了一系列带有简单手性二胺配体的锰配合物的合成、表征和催化应用。我们进行了广泛的实验和计算机制研究,并首次对 Mn 催化的 ATH 进行了详细的实验动力学研究。我们证明了催化剂优化的传统机械方法失败了,以及明显不同的预催化剂如何导致相同的中间体,从而产生相同的催化性能。最终,所研究的 Mn-N,N 配合物能够将苯乙酮定量 ATH 转化为 ee 为 75-87% 的相应手性醇。
[EN] BENZIMIDAZOLE SUBSTITUTION-BASED PHENYL N-BUTYRAMIDE COMPOUND AND PREPARATION METHOD THEREFOR<br/>[FR] COMPOSÉ DE PHÉNYL N-BUTYRAMIDE BASÉ SUR LA SUBSTITUTION DE BENZIMIDAZOLE ET SON PROCÉDÉ DE PRÉPARATION<br/>[ZH] 基于苯并咪唑取代的苯基正丁酰胺的化合物及其制备方法
Bioinspired tetraamino-bisthiourea chiral macrocycles in catalyzing decarboxylative Mannich reactions
作者:Hao Guo、Yu-Fei Ao、De-Xian Wang、Qi-Qiang Wang
DOI:10.3762/bjoc.18.51
日期:——
easy synthesis, gram-scale of macrocycle products can be readily obtained. These chiral macrocycles were applied in catalyzing bioinspired decarboxylativeMannichreactions. Only 5 mol % of the optimal macrocycle catalyst efficiently catalyzed the decarboxylative addition of a broad scope of malonic acid half thioesters to isatin-derived ketimines with excellent yields and good enantioselectivity. The
Shepherd,R.G.; Wilkinson,R.G., Journal of medicinal and pharmaceutical chemistry, 1962, vol. 5, p. 823 - 835
作者:Shepherd,R.G.、Wilkinson,R.G.
DOI:——
日期:——
A METHOD FOR PREPARING OPTICALLY ACTIVE CARBONYL COMPOUND
申请人:ZHEJIANG NHU COMPANY LTD.
公开号:US20180105477A1
公开(公告)日:2018-04-19
The present invention discloses a method for preparing optically active carbonyl compound, comprising the following steps: under the catalysis of chiral amine salt and transition metal catalysts, with hydrogen and catalytic amount of dihydropyridine compound as hydrogen source, use α, β-unsaturated aldehydes or α, β-unsaturated troponoid compounds to conduct asymmetric catalytic reaction to obtain the optically active carbonyl compound. This method comes in moderate reaction condition, simple operation, and catalytic amount of dihydropyridine compounds usage, the target product is easy to be separated and purified from the reaction system, and the metal catalyst can be recycled, it is economical.