Asymmetric Catalysis. 151 [1] Wilkinson-type [Rh(diop)(PPh3)Hal] Catalysts in the Enantioselective Hydrogenation of Ketopantolactone

The Wilkinson‐type catalysts [Rh(diop)(PPh3)Cl] and [Rh(diop)(PPh3)I] have been synthesised and characterised by X‐ray structure analysis. In the crystal the distorted square planar compounds form pairs of diastereomers. The compounds were tested as catalysts in the enantioselective hydrogenation of...

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Bibliographic Details
Published in:Zeitschrift für anorganische und allgemeine Chemie (1950) 2003-07, Vol.629 (7-8), p.1131-1135
Main Authors: Brunner, Henri, Zettler, Christian, Zabel, Manfred
Format: Article
Language:English
Subjects:
Catalysis
Enantioselectivity
Hydrogenation
Ketopantolactone
Rhodium
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Summary:The Wilkinson‐type catalysts [Rh(diop)(PPh3)Cl] and [Rh(diop)(PPh3)I] have been synthesised and characterised by X‐ray structure analysis. In the crystal the distorted square planar compounds form pairs of diastereomers. The compounds were tested as catalysts in the enantioselective hydrogenation of ketopantolactone. With 65 % ee the iodo complex achieved a higher enantioselectivity than the chloro complex (55 % ee). Asymmetric Catalysis. 151 [1] Katalysatoren [Rh(diop)(PPh3)Hal] vom Wilkinson‐Typ in der enantioselektiven Hydrierung von Ketopantolacton Die Wilkinson‐artigen Katalysatoren [Rh(diop)(PPh3)Cl] und [Rh(diop)(PPh3)I] wurden synthetisiert und durch Röntgenstrukturanalyse charakterisiert. Im Kristall bilden die verzerrt quadratisch‐planaren Verbindungen Paare von Diastereomeren. Die Verbindungen wurden als Katalysatoren in der enantioselektiven Hydrierung von Ketopantolacton getestet. Dabei ergab der Iod‐Komplex mit 65 % ee höhere Enantioselektivitäten als der Chlor‐Komplex mit 55 % ee.
ISSN:0044-2313
1521-3749
DOI:10.1002/zaac.200300009