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DOI: 10.1055/s-2006-926455
Heterogenization of (η 5 -C 5 Me 5 )Ru(PPh 3 ) 2 Cl and Its Catalytic Application for Cyclopropanation of Styrene Using Ethyl Diazoacetate
Publication History
Publication Date:
27 April 2006 (online)
Abstract
(η5-C5Me5)Ru(PPh3)2Cl (1) is heterogenized on the surface of mesoporous molecular sieves by direct grafting on mesoporous aluminosilicates or by reaction of an aminosilane-linker-modified silicate surface with the chloride ligand. Elemental analyses reveal that the grafted samples contain 0.2-1.8 wt% Ru. The retaining of long-range ordering of mesoporous MCM-41 and MCM-48 after grafting is evidenced from XRD, N2 adsorption-desorption and TEM analysis. FT-IR, TG-MS, 29Si and 1H CP MAS-NMR spectra confirm the successful grafting of complex 1 on the surface of these mesoporous materials. Mesoporous materials grafted with complex 1 are found to be promising catalysts for the cyclopropanation of styrene with ethyl diazoacetate.
Key words
cyclopropanation - ethyl diazoacetate - ruthenium complex - mesoporous materials
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