Catalytic reduction of acetophenone with transition metal systems containing chiral bis(oxazolines)

被引：21

作者：

Gómez, M

Jansat, S

Muller, G

Bonnet, MC

Breuzard, JAJ

Lemaire, M

机构：

[1] Univ Lyon 1, UMR 5622, Lab Catalyse & Synthese Organ, F-69622 Villeurbanne, France

[2] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2002年 / 659卷 / 1-2期

关键词：

homogenous catalysis; chiral bis(oxazolines); transition metals; NMR spectroscopy; PM3(tm) calculations;

D O I：

10.1016/S0022-328X(02)01767-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The catalytic behaviour of several Ru, Rh and It systems containing bis(oxazoline) ligands (1-6) has been tested in the asymmetric reduction of acetophenone (7) to give 1-phenylethanol (8) by hydrogenation (Ir systems), transfer hydrogenation (It and Ru systems) and hydrosilylation (Ir and Rh systems). Ligands 1 and 3 gave good activities, obtaining the best asymmetric induction with Ir-1 system in the hydrosilylation (ee up to 50% (S) of 8). In order to identify the catalytic precursors, Ru (9-11) and It (12) complexes were synthesised and characterised. NMR studies of ruthenium complexes showed the existence of two main isomers in a ca. ratio 3/1, in agreement with the PM3(tm) calculations carried out for 10. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：186 / 195

页数：10

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