[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.
Direct Formation of Tethered Ru(II) Catalysts Using Arene Exchange
作者:Rina Soni、Katherine E. Jolley、Guy J. Clarkson、Martin Wills
DOI:10.1021/ol4024979
日期:2013.10.4
An 'arene exchange' approach has been successfully applied for the first time to the synthesis of Ru(II)-based 'tethered' reduction catalysts directly from their ligands in one step. This provides an alternative method for the formation of known complexes, and a route to a series of novel complexes. The novel complexes are highly active in both asymmetric transfer and pressure hydrogenation of ketones.
Synthesis and Catalytic Applications of an Extended Range of Tethered Ruthenium(II)/η<sup>6</sup>-Arene/Diamine Complexes
作者:Roy Hodgkinson、Václav Jurčík、Antonio Zanotti-Gerosa、Hans Günter Nedden、Andrew Blackaby、Guy J. Clarkson、Martin Wills
DOI:10.1021/om500788t
日期:2014.10.13
A series of novel enantiopure Ru(II) complexes containing a chiral diamine and eta(6)-arene connected by a tethering group have been prepared and were evaluated in the asymmetric reductions of a range of ketones. Changes to the level of steric hindrance and the addition of an electron withdrawing functionality on the sulfonyl group have a significant effect on the reactivity and enantioselectivity of the catalysts.