Well-defined silica-supported zirconium–imido complexes mediated heterogeneous imine metathesis?
Chemical Communications Pub Date: 2016-02-15 DOI: 10.1039/C6CC00471G
Abstract
Upon prolonged thermal exposure under vacuum, a well-defined single-site surface species [(![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
Si–O–)Zr(NEt2)3] (1) evolves into an ethylimido complex [(Si–O–)Zr(![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
NEt)NEt2] (2). Reactions of 2 with an imine substrate result in imido/imine (NRi, R: Et, Ph) exchange (metathesis) with the formation of [(Si–O–)Zr(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.
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Journal Name：Chemical Communications
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