Catalytic Asymmetric Synthesis of N-Chiral Amine Oxides
作者:Sukalyan Bhadra、Hisashi Yamamoto
DOI:10.1002/anie.201606354
日期:2016.10.10
Direct asymmetricsynthesis of N‐chiralamine oxides was accomplished (up to 91:9 e.r.) by means of a bimetallic titanium catalyst. A hydroxy group situated at the γ‐position of the N stereocenter enables the desired N‐oxidation through dynamic kinetic resolution of the trivalent amine substrates. The method was further extended to the kinetic resolution of racemic γ‐amino alcohols with a preexisting
Manganese‐Catalyzed Asymmetric Formal Hydroamination of Allylic Alcohols: A Remarkable Macrocyclic Ligand Effect
作者:Faju Li、Linhong Long、Yan‐Mei He、Zeyu Li、Hui Chen、Qing‐Hua Fan
DOI:10.1002/anie.202202972
日期:2022.6.27
The first example of Mn-catalyzed asymmetric formal anti-Markovnikov hydroamination of allylic alcohols is described by using a chiral peraza N6-macrocyclic ligand. DFT calculations revealed that multiple noncovalent interactions existed among the ligand, solvent, and substrate in the transition states, showing a remarkable macrocyclic ligand effect.
通过使用手性 peraza N 6 -大环配体描述了 Mn 催化的烯丙醇不对称形式反马尔科夫尼科夫加氢胺化的第一个例子。DFT计算表明,过渡态的配体、溶剂和底物之间存在多种非共价相互作用,表现出显着的大环配体效应。
Samaddar, Ashis K.; Konar, Samir K.; Nasipuri, Dhanonjoy, Journal of the Chemical Society. Perkin transactions I, 1983, # 7, p. 1449 - 1451