The study on catalysis of salen-derived metal complexes has been carried out almost exclusively with their trans-isomers, even though recent studies disclosed that cis-isomers show unique reactivity that cannot be attained with other metal complexes [1]. We report here on the synthesis and the crystal structure of a new cis-beta ruthenium carbonyl complex of Jacobsen’s Schiff base (H2L). All the spectroscopic features of the Ru(CO)2L complex are indicative of a cis disposition of the two carbonyls. The proposed cis-beta structure has been confirmed by an X-ray analysis. Ru(CO)2L has been successfully employed as catalysts in asymmetric cyclopropanation reactions. Since our group has recently reported the use of aryl azides as aminating agents [2], we next examined the catalytic activity of Ru(CO)2L for the amination reaction of olefins with organic azides and the results will be discussed.
Synthesis and Structural Characterization of a cis-beta Ru(CO)2-Schiff Base Complex and Its Use in Asymmetric Cyclopropanation and Amination Reaction / A. Caselli, E. Gallo, F. Ragaini, C. Carminati, P. Macchi, N. Casati, S. Cenini. ((Intervento presentato al 1.. convegno European Chemistry Congress tenutosi a Budapest (H) nel 2006.
Synthesis and Structural Characterization of a cis-beta Ru(CO)2-Schiff Base Complex and Its Use in Asymmetric Cyclopropanation and Amination Reaction
A. Caselli;E. Gallo;F. Ragaini;P. Macchi;N. Casati;S. Cenini
2007
Abstract
The study on catalysis of salen-derived metal complexes has been carried out almost exclusively with their trans-isomers, even though recent studies disclosed that cis-isomers show unique reactivity that cannot be attained with other metal complexes [1]. We report here on the synthesis and the crystal structure of a new cis-beta ruthenium carbonyl complex of Jacobsen’s Schiff base (H2L). All the spectroscopic features of the Ru(CO)2L complex are indicative of a cis disposition of the two carbonyls. The proposed cis-beta structure has been confirmed by an X-ray analysis. Ru(CO)2L has been successfully employed as catalysts in asymmetric cyclopropanation reactions. Since our group has recently reported the use of aryl azides as aminating agents [2], we next examined the catalytic activity of Ru(CO)2L for the amination reaction of olefins with organic azides and the results will be discussed.Pubblicazioni consigliate
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