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Chemistry. 2012 Jul 16;18(29):9011-8. doi: 10.1002/chem.201200408. Epub 2012 Jun 25.

Phosphine-imidazolyl ligands for the efficient ruthenium-catalyzed hydrogenation of carboxylic esters.

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1
Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany.

Abstract

The synthesis of phosphine-imidazolyl ligands 1 and 2 in good yields is presented. In combination with [{Ru(benzene)Cl(2)}(2)], ligands 1 c and 1 e formed efficient catalyst systems for the selective hydrogenation of various carboxylic esters into their corresponding primary alcohols. Furthermore, the structures of four ruthenium complexes with ligands 1 b, 1 c, 1 d, and 1 e were determined by X-ray crystallography, which showed the formation of different coordination modes depending on the ligand structure.

PMID:
22733711
DOI:
10.1002/chem.201200408
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