Ruthenium metal alkylidene complexes coordinated with triazolylidene ligands that exhibit high olefin metathesis activity
US6624265B2 · kind B2 · utility
17Cited by
9References
20Claims
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Key dates
| Filing date | Jan 25, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Apr 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F15/0046
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention discloses ruthenium alkylidene complexes of the type (PCy3)(L)Cl2Ru(CHPh), where L is a triazolylidene ligand of the general formula: These catalysts have been found to be considerably more active for olefin metathesis at elevated temperatures than the parent catalyst (PCy3)2Cl2Ru(CHPh)(2). For example, complex 14 (L=1,3,4-triphenyl-4.5-dihydro-1H-triazol-5-ylidene) is able to catalyze the ring-closing metathesis of substituted dienes to give tetra-substituted cyclic olefins in good yield. In addition, this complex demonstrates the analogous stability towards oxygen and moisture exhibited by ruthenium alkylidene 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.