Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis. Issue 25 (23rd February 2016)

• Record Type: Journal Article
• Authors: Hamzaoui, Bilel; Pelletier, Jérémie D. A.; Abou-Hamad, Edy; Basset, Jean-Marie
• Is Part Of: Chemical communications. Volume 52:Issue 25(2016)
• Page Start: 4617
• Page End: 4620
• Publication Date: 2016-02-23
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc00471g
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Well-defined silica-supported zirconium–imido complexes effectively catalyze imine/imine cross-metathesis and are thus considered as the first heterogeneous catalysts active for imine metathesis. Abstract : Upon prolonged thermal exposure under vacuum, a well-defined single-site surface species [(Si–O–)Zr(NEt2 )3 ] (1 ) evolves into an ethylimido complex [(Si–O–)Zr(NEt)NEt2 ] (2 ). Reactions of2 with an imine substrate result in imido/imine (NRi, R: Et, Ph) exchange (metathesis) with the formation of [(Si–O–)Zr(NPh)NEt2 ] (3 ). Compounds2 and3 effectively catalyze imine/imine cross-metathesis and are thus considered as the first heterogeneous catalysts active for imine metathesis.