Synthesis of ruthenium or osmium metathesis catalysts
US5917071A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Nov 7, 2017 |
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 vinyl alkylidene catalysts. In one embodiment, the invention may be summarized by the following reaction scheme ##STR1## wherein n is 1 or 2; PA1 X and X.sup.1 are each anionic ligands; PA1 L and L.sup.1 are each neutral electron donors and PA1 R.sup.17 which is hydrogen, aryl or C.sub.1 -C.sub.18 alkyl; and, PA1 R.sup.12 and R.sup.13 are each hydrogen or one of the following substituent groups: C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.2 -C.sub.18 alkynyl, aryl, C.sub.1 -C.sub.18 carboxylate, C.sub.1 -C.sub.18 alkoxy, C.sub.2 -C.sub.18 alkenyloxy, C.sub.2 -C.sub.18 alkynyloxy, aryloxy, C.sub.2 -C.sub.18 alkoxycarbonyl, C.sub.1 -C.sub.18 alkylthio, C.sub.1 -C.sub.18 alkylsulfonyl and C.sub.1 -C.sub.18 alkylsulfinyl. In addition to the ease of synthesis (typically a one-step synthesis), the reactions generally may be run at or above room temperature and the resulting products usually may be used without extensive post synthesis purification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.