catalyzed procedure for the N-arylation of simple aliphatic amines, amino alcohols and amino acids in pure water have been developed. A variety of substituted aryl iodides, bromides and electron-deficient chlorides were found to be applicable, and 1,2-disubstituted benzimidazoles could be prepared easily by a cascade amination/condensation process in this catalyticsystem.
作者:Kai Chen、Qi-Kai Kang、Yuntong Li、Wen-Qiang Wu、Hui Zhu、Hang Shi
DOI:10.1021/jacs.1c12622
日期:2022.1.26
availability of both phenols and amines, aniline synthesis through direct coupling between these starting materials would be extremely attractive. Herein, we describe a rhodium-catalyzed amination of phenols, which provides concise access to diverse anilines, with water as the sole byproduct. The arenophilic rhodium catalyst facilitates the inherently difficult keto–enol tautomerization of phenols by means of
An efficient and rapid procedure for ring opening of various epoxides with aromatic, aliphatic and heterocyclicamines is developed at room temperature under solvent-free conditions in the presence of (C4H12N2)2[BiCl6]Cl·H2O (1 mol %). This catalyst can be reused several times without losing of its activity.
在(C 4 H 12 N 2)2 [BiCl 6 ] Cl·H 2 O存在下,在室温下在无溶剂的条件下,开发了一种高效快速的方法,可用于芳族,脂族和杂环胺的各种环氧化物的开环。(1摩尔%)。该催化剂可以重复使用几次而不会失去其活性。
Green Progression for Synthesis of Regioselective β-Amino Alcohols and Chemoselective Alkylated Indoles
作者:Boningari Thirupathi、Rapelli Srinivas、Avvari N. Prasad、J. K. Prashanth Kumar、Benjaram M. Reddy
DOI:10.1021/op1002177
日期:2010.11.19
Solid acid catalysts based on zirconia materials were investigated for the first time as catalysts for regioselective organic synthesis under environmentally benign and mild conditions. The novel TiO2−ZrO2 mixed oxide catalyst led to two distinct products by the formation of an N−C bond (β-aminoalcohols) and a C−C bond (Friedel−Crafts alkylation).
Carbon dioxide-based facile synthesis of cyclic carbamates from amino alcohols
作者:Teemu Niemi、Israel Fernández、Bethany Steadman、Jere K. Mannisto、Timo Repo
DOI:10.1039/c8cc00636a
日期:——
for the synthesis of cyclic carbamatesfromaminoalcohols and carbon dioxide in the presence of an external base and a hydroxyl group activating reagent. Utilizing p-toluenesulfonyl chloride (TsCl), the reaction proceeds under mild conditions, and the approach is fully applicable to the preparation of various high value-added 5- and 6-membered rings as well as bicyclic fused ring carbamates. DFT calculations
我们在本文中报道了在外部碱和羟基活化剂存在下由氨基醇和二氧化碳合成环状氨基甲酸酯的简单通用方法。利用对甲苯磺酰氯(TsCl),该反应在温和的条件下进行,该方法完全适用于制备各种高附加值的5-和6-元环以及双环稠合的氨基甲酸酯。DFT计算和实验结果表明具有高区域选择性,化学选择性和立体选择性的S N 2型反应机理。