Ruthenium Catalysts for Hydrogenation of Aromatic and Aliphatic Esters: Make Use of Bidentate Carbene Ligands
作者:Felix A. Westerhaus、Bianca Wendt、Andreas Dumrath、Gerrit Wienhöfer、Kathrin Junge、Matthias Beller
DOI:10.1002/cssc.201200825
日期:2013.6
Committed carbenes: The convenient application of bidentatecarbeneligands is described for the hydrogenation of carboxylic acid esters. The ligand precursors are easily synthesized through the dimerization of N‐substituted imidazoles with diiodomethane. The catalyst is generated in situ and exhibits good activity and functional group tolerance for the hydrogenation of aromatic and aliphatic carboxylic
Economical alcohols! A general and chemoselective catalytic reduction of esters to alcohols using inexpensive zinc acetate and silanes has been developed. The operational simplicity and the high functional group tolerance, without the need for protecting and deprotecting steps, make this procedure particularly attractive for organic synthesis.
Improved cross-metathesis of acrylate esters catalyzed by 2nd generation ruthenium carbene complexes
作者:Grant S. Forman、Robert P. Tooze
DOI:10.1016/j.jorganchem.2005.07.107
日期:2005.12
The performance of cross-metathesis reactions between acrylate esters and olefins catalyzed by Grubbs catalysts have been enhanced by the simple addition of p-cresol. For example, the efficiency of the cross metathesis reaction between methyl acrylate and 1-decene catalyzed by 2 was significantly increased by addition of p-cresol to the reaction mixture, resulting in increased product yields and E/Z ratios. (c) 2005 Elsevier B.V. All rights reserved.