IRIS Institutional Research Information System - AIR Archivio Istituzionale della Ricerca

IRIS è il sistema di gestione integrata dei dati della ricerca (persone, progetti, pubblicazioni, attività) adottato dall'Università degli Studi di Milano.

AIR nasce in UNIMI nel 2006 con lo scopo di raccogliere, documentare e conservare le informazioni sulla produzione scientifica dell'Università degli Studi di Milano e costituisce di fatto l'Anagrafe della ricerca dell'Ateneo.

Cobalt(II) porphyrin complexes catalyze reactions between ethyl diazoacetate (EDA) and styrenes to give the corresponding cyclopropanes with trans selectivity. The reactions of other diazoalkanes and other olefins have also been carried out, and the mechanism of the reaction has been investigated. Kinetic data and stoichiometric reactions support the formation of a diazoalkane cobalt-porphyrin complex that reacts with the olefins to generate the cyclopropane. Diethyl maleate and fumarate are not formed in the presence of an excess of olefin. On treatment of EDA with Co-II(TPP) (TPP = dianion of meso-tetraphenylporphyrin) in the absence of the olefin, an alkyl cobalt(III) complex Co-III(TPP)(CH2CO2Et) was isolated, and its structure has been solved by X-ray diffraction.

Cyclopropanation of olefins with diazoalkanes, catalyzed by Co-II(porphyrin) complexes : A synthetic and mechanistic investigation and the molecular structure of Co-III(TPP)(CH2CO2Et) (TPP = dianion of meso-tetraphenylporphyrin) / A. Penoni, R. Wanke, S. Tollari, E. Gallo, D. Musella, F. Ragaini, F. Demartin, S. Cenini. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - :7(2003), pp. 1452-1460.

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