Application of Tethered Ruthenium Catalysts to Asymmetric Hydrogenation of Ketones, and the Selective Hydrogenation of Aldehydes
作者:Katherine E. Jolley、Antonio Zanotti‐Gerosa、Fred Hancock、Alan Dyke、Damian M. Grainger、Jonathan A. Medlock、Hans G. Nedden、Jacques J. M. Le Paih、Stephen J. Roseblade、Andreas Seger、Vilvanathan Sivakumar、Ivan Prokes、David J. Morris、Martin Wills
DOI:10.1002/adsc.201200362
日期:2012.9.17
An improved method for the synthesis of tethered ruthenium(II) complexes of monosulfonylated diamines is described, together with their application to the hydrogenation of ketones and aldehydes. The complexes were applied directly, in their chloride form, to asymmetric ketone hydrogenation, to give products in excess of 99% ee in the best cases, using 30 bar of hydrogen at 60 °C, and to the selective
[EN] CATALYST AND PROCESS FOR SYNTHESISING THE SAME<br/>[FR] CATALYSEUR ET SON PROCÉDÉ DE SYNTHÈSE
申请人:UNIV WARWICK
公开号:WO2014068331A1
公开(公告)日:2014-05-08
The invention relates to a method for synthesising tethered ruthenium catalysts and novel tethered ruthenium catalysts obtainable by this methods. The method involves carrying out an "arene swapping" reaction avoiding the requirement to use complicated techniques making use of unreliable Birch reductions and unstable cyclodienyl intermediates.
the amine nitrogen atom were prepared and evaluated in the asymmetrictransfer hydrogenation of ketones. Bidentate and tridentate ligands demonstrated a mutual exclusivity directly related to their function as catalysts. A broad series of ketones were reduced with these new catalysts, permitting the ready identification of an optimal catalyst for each substrate and revealing the subtle effects that changes
An outstanding catalyst for asymmetric transfer hydrogenation in aqueous solution and formic acid/triethylamine
作者:Daljit S. Matharu、David J. Morris、Guy J. Clarkson、Martin Wills
DOI:10.1039/b606288a
日期:——
A Rh/tetramethylcyclopentadienyl complex containing a tethered functionality has been demonstrated to give excellent results in the asymmetric transfer hydrogenation of ketones in both aqueous and formic acid/triethylamine media.
The “Reverse-Tethered” Ruthenium (II) Catalyst for Asymmetric Transfer Hydrogenation: Further Applications
作者:David J. Morris、Aidan M. Hayes、Martin Wills
DOI:10.1021/jo061154l
日期:2006.9.1
The attachment of a tethering group from the basic nitrogen atom to the arene ligand of a ruthenium(II) catalyst greatly improves its ability to catalyze asymmetric transfer hydrogenation (ATH) reactions. In this paper, we describe further applications of this versatile system to an extended substrate range.