Synthesis, crystal structure and application in regio- and stereoselective epoxidation of allylic alcohols of a titanium binaphthyl-bridged Schiff base complex

Annunziata, Soriente; Margherita, DE ROSA; Marina, Lamberti.; Consiglia, Tedesco; Arrigo, Scettri; Claudio, Pellecchia

doi:10.1016/j.molcata.2005.03.012

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A new octahedral titanium binaphthyl-bridged Schiff base complex (1) was synthesized and characterized. Analysis by 1H and 13C-NMR spectroscopy and X-ray crystallography indicated that the C1-symmetric cis- isomer is preferentially formed as one of the two possible enantiomeric couples of diasteroisomers. The catalytic behaviour of the complex 1 toward epoxidation of allylic alcohols was investigated. Using only 0.5% mol of the complex 1 the epoxyalcohols are obtained in very high regio-, chemo- and diastereoselctive way by the MW exposure of the mixture in solvent free-conditions.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/1061194

Titolo:	Synthesis, crystal structure and application in regio- and stereoselective epoxidation of allylic alcohols of a titanium binaphthyl-bridged Schiff base complex
Autori interni:	SORIENTE, Annunziata DE ROSA, Margherita LAMBERTI, Marina TEDESCO, Consiglia PELLECCHIA, Claudio
Data di pubblicazione:	2005
Rivista:	JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL
Abstract:	A new octahedral titanium binaphthyl-bridged Schiff base complex (1) was synthesized and characterized. Analysis by 1H and 13C-NMR spectroscopy and X-ray crystallography indicated that the C1-symmetric cis- isomer is preferentially formed as one of the two possible enantiomeric couples of diasteroisomers. The catalytic behaviour of the complex 1 toward epoxidation of allylic alcohols was investigated. Using only 0.5% mol of the complex 1 the epoxyalcohols are obtained in very high regio-, chemo- and diastereoselctive way by the MW exposure of the mixture in solvent free-conditions.
Handle:	http://hdl.handle.net/11386/1061194
Appare nelle tipologie:	1.1.2 Articolo su rivista con ISSN

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