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 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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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. |
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ISSN: | 0008-4042 1480-3291 |
DOI: | 10.1139/v05-039 |