Metal-free C–H amination of arene with <i>N</i>-fluorobenzenesulfonimide catalysed by nitroxyl radicals at room temperature
作者:Qi Miao、Zhong Shao、Cuiying Shi、Lifang Ma、Fang Wang、Ruoqi Fu、Haochen Gao、Ziyuan Li
DOI:10.1039/c9cc02739d
日期:——
amination of arenethrough C–H bond cleavage employing N-fluorobenzenesulfonimide (NFSI) as the amination reagent in good to excellent yields with broad arene scope in the absence of any metal, ligand or additive is reported. Unlike previous transition metal-catalysed aminations in which high reaction temperatures are usually necessary, this novel reaction at room temperature is the first example of C–H
Asymmetric hydrogenation of 2-substituted N-protected-indoles catalyzed by rhodium complexes of BINOL-derived phosphoramidites
作者:Nataša Mršić、Thomas Jerphagnon、Adriaan J. Minnaard、Ben L. Feringa、Johannes G. de Vries
DOI:10.1016/j.tetasy.2009.11.017
日期:2010.1
The rhodium-catalyzed asymmetrichydrogenation of 2-substituted N-protected-indoles using monodentatephosphoramidites as ligands was examined. Full conversion and 74% ee, were obtained with a catalyst based on PipPhos. The use of a catalytic amount of base is necessary for activity; best results were obtained with Cs2CO3.
研究了使用单齿亚磷酰胺作为配体的铑催化的2-取代的N-保护的吲哚的不对称氢化。用基于PipPhos的催化剂获得完全转化和74%ee。为了活性,必须使用催化量的碱。Cs 2 CO 3可获得最佳结果。
A new approach was described for the synthesis of substituted 2-carboxyindole using 3-(2-aminophenyl)-2-bromo-acrylates through a CuI-catalyzed intramolecular coupling. The reactions were mild, rapid and with good to excellent yields. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
Catalytic Asymmetric Hydrogenation of Heteroaromatic Compounds, Indoles
作者:Ryoichi Kuwano、Koji Sato、Takashi Kurokawa、Daisuke Karube、Yoshihiko Ito