Synthesis of ruthenium or osmium metathesis catalysts
US6504041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/825
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to the synthesis of highly active ruthenium and osmium carbene metathesis catalyst in good yield from readily available starting materials. The catalysts that may be synthesized are of the general formula wherein:M is ruthenium or osmium;X and X1 are independently any anionic ligand;L and L1 are any neutral electron donor ligand; and,R and R1 are each hydrogen or one of the following substituent groups: C2-C20 alkenyl, C2-C20 alkynyl, C1-C20 alkyl, aryl, C1-C20 carboxylate, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, aryloxy, C2-C20 alkoxycarbonyl, C1-C20 alkylthio, C1-C20 alkylsulfonyl and C1-C20 alkylsulfinyl. Optionally, the substituent group may be substituted with one or more groups selected from C1-C5 alkyl, halogen, C1-C5alkoxy, and aryl. When the substitute aryl group is phenyl, it may be further substituted with one or more groups selected from a halogen, a C1-C5 alkyl, or a C1-C5 alkoxy. Specific synthetic protocols for vinyl alkylidene catalysts wherein R is hydrogen and R1 is —CHCR12R13 and non-vinyl alkylidene catalysts are also disclosed. In addition to the ease of synthesis (typically a one-step synthesis), the reactions g…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.