Lewis-acid assisted cross metathesis of acrylonitrile with functionalized olefins catalyzed by phosphine-free ruthenium carbene complex

The exchange of the PPh3 ligand in the complex [1,3-bis(2,6-dimethylphenyl)4,5-dihydroimidazol-2-ylidene](PPh3)-(Cl)(2)Ru=CHPh (7) for a pyridine ligand at ambient temperature leads to the formation of the stable phosphine-free carbene ruthenium complex [1,3-bis(2,6-dimethylphenyl)4,5-dihydroimidazo...

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Published inOrganic & biomolecular chemistry Vol. 3; no. 22; pp. 4139 - 4142
Main Authors Bai, CX, Lu, XB, He, R, Zhang, WZ, Feng, XJ
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 21.11.2005
Subjects
Chemistry
Chemistry, Organic
Physical Sciences
Science & Technology
POLYMERIZATION
RUCL2(=CHR)(PR)
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Summary:The exchange of the PPh3 ligand in the complex [1,3-bis(2,6-dimethylphenyl)4,5-dihydroimidazol-2-ylidene](PPh3)-(Cl)(2)Ru=CHPh (7) for a pyridine ligand at ambient temperature leads to the formation of the stable phosphine-free carbene ruthenium complex [1,3-bis(2,6-dimethylphenyl)4,5-dihydroimidazol-2-ylidene](C5H5N)(2)(Cl)(2) Ru=CHPh (8). The resulted ruthenium complex exhibits highly catalytic activity for the cross metathesis of acrylonitrile with various functionalized olefins under mild conditions, and its activity can be further improved by the addition of a Lewis acid such as Ti(O'Pr)(4). In the mixture products, the Z-isomer predominates.
ISSN:1477-0520
1477-0539
DOI:10.1039/b510776h