期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 -, 期 27, 页码 4365-4370出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201200643
关键词
Homogeneous catalysis; Asymmetric catalysis; Ruthenium; Phosphane ligands; Reduction; Hydrogenation; Atropoisomerism
资金
- European Social Found (FSE), Regione Lombardia (program Dote ricerca)
- Universita di Milano
Ruthenium(II) dichlorides with racemic atropos-biaryl-based diphosphanes and optically active 1,2-diphenylethane-1,2-diamine (DPEN) as ligands have been synthesised. trans and cis isomers were formed due to the low basicity of the diphosphane ligands, in particular, with BITIANP and BIMIP. The trans and cis species were easily separated by filtration. In particular, when rac-BITIANP was used in combination with chiral DPEN, the asymmetric separation of optically pure complexes in cis and trans arrangements was realised and they were used as precatalysts in the asymmetric hydrogenation of ketones. Matching and mismatching combinations exhibited different performances.
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