New pseudohalide ligands in Ru-catalyzed olefin metathesis — A robust, air-activated iminopyrrolato catalyst

Reaction of the Grubbs catalyst RuCl 2 (PCy 3 ) 2 (CHPh) ( 1 ) with lithium 2-[(2,6-diisopropylphenyl)imino]pyrrolide · Et 2 O (LiNN′ · Et 2 O) gives alkylidene complex 5 , containing a chelating, σ-bound iminopyrrolato unit. The structure of 5 is confirmed by X-ray crystallography. Treatment of 5 w...

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Veröffentlicht in:Canadian journal of chemistry 2005-06, Vol.83 (6-7), p.748-754
Hauptverfasser: Drouin, Samantha D, Foucault, Heather M, Yap, Glenn PA, Fogg, Deryn E
Format: Artikel
Sprache:eng
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Zusammenfassung:Reaction of the Grubbs catalyst RuCl 2 (PCy 3 ) 2 (CHPh) ( 1 ) with lithium 2-[(2,6-diisopropylphenyl)imino]pyrrolide · Et 2 O (LiNN′ · Et 2 O) gives alkylidene complex 5 , containing a chelating, σ-bound iminopyrrolato unit. The structure of 5 is confirmed by X-ray crystallography. Treatment of 5 with pyridine generates RuCl(NN′)(py) 2 (CHPh) ( 6 ) via displacement of PCy 3 . Complex 5 effects ring-closing metathesis in air, displaying high reactivity relative to 6 .Key words: ruthenium, alkylidene, metathesis, pyrrolimine, iminopyrrolato.
ISSN:0008-4042
1480-3291
DOI:10.1139/v05-039