Aerobicoxidation of aldehydes to 1,2‐ and 1,3‐diol monoesters was catalyzed by polymer‐incarcerated gold nanoclusters under ambient conditions. The esterification proceeded much faster with 1,2‐ and 1,3‐diols and their derivatives rather than with methanol.
Synthesis of Optically Active β- or γ-Alkyl-Substituted Alcohols through Copper-Catalyzed Asymmetric Allylic Alkylation with Organolithium Reagents
作者:Sureshbabu Guduguntla、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1021/jo401536u
日期:2013.9.6
An efficient one-pot synthesis of optically active β-alkyl-substituted alcohols through a tandem copper-catalyzedasymmetricallylicalkylation (AAA) with organolithium reagents and reductive ozonolysis is presented. Furthermore, hydroboration–oxidation following the Cu-catalyzed AAA leads to the corresponding homochiral γ-alkyl-substituted alcohols.
A highly efficient and sustainable catalyst system for terminal epoxy-carboxylic acid ring opening reactions
作者:Tizian-Frank Ramspoth、Jitte Flapper、Keimpe J. van den Berg、Ben L. Feringa、Syuzanna R. Harutyunyan
DOI:10.1039/d3gc04301k
日期:——
nucleophilic ringopening of epoxides by carboxylic acids is an indispensable transformation for materials science and coating technologies. Due to this industrial significance, improvements in operational energy consumption and catalyst sustainability are highly desirable for this transformation. Herein, an efficient, environmentally benign and non-toxic halide free cooperative catalyst system based on
羧酸对环氧化物的亲核开环是材料科学和涂层技术不可或缺的转变。由于这种工业意义,对于这种转变来说,提高运行能耗和催化剂可持续性是非常必要的。本文报道了一种基于苯甲酸铁( III )配合物和碳酸胍的高效、环境友好且无毒的无卤化物协同催化剂体系。在纯条件下和在多种溶剂(包括苯甲醚和n BuOAc)中,新型催化剂体系表现出比卤化鎓催化剂更高的活性。使用FeCl 3 /DMAP作为催化剂的详细机理研究揭示了羧酸盐桥接阳离子三核μ 3 -氧代铁簇和碳酸胍或DMAP由于其优异的活性而作为羧酸盐储库的重要性。
Group 14 organometallic reagents. 9. Organotin-mediated monoacylation of diols with reversed chemoselectivity: a convenient synthetic method