Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis

B. Hamzaoui, J. D. A. Pelletier, E. Abou-Hamada and J-M
Chem. Commun., 52, 4617-4620, (2016)

Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis

Keywords

Heterogeneous catalysts

Abstract

​Upon prolonged thermal exposure under vacuum, a well-defined single-site surface species [([triple bond, length as m-dash]Si–O–)Zr(NEt2)3] (1) evolves into an ethylimido complex [([triple bond, length as m-dash]Si–O–)Zr([double bond, length as m-dash]NEt)NEt2] (2). Reactions of 2 with an imine substrate result in imido/imine ([double bond, length as m-dash]NRi, R: Et, Ph) exchange (metathesis) with the formation of [([triple bond, length as m-dash]Si–O–)Zr([double bond, length as m-dash]NPh)NEt2] (3). Compounds 2 and 3 effectively catalyze imine/imine cross-metathesis and are thus considered as the first heterogeneous catalysts active for imine metathesis.


Code

DOI: 10.1039/C6CC00471G

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