Organometallic ruthenium complexes and related methods for the preparation of tetra-substituted and other hindered olefins
US8008224B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Nov 9, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/821
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to ruthenium alkylidene complexes having an N-heterocyclic carbene ligand comprising a 5-membered heterocyclic ring having a carbenic carbon atom and at least one nitrogen atom contained within the 5-membered heterocyclic ring, wherein the nitrogen atom is directly attached to the carbenic carbon atom and is substituted by a phenyl ring, and wherein the phenyl ring has a hydrogen at either or both ortho positions and is substituted at at least one ortho or meta position. The invention also relates to an olefin metathesis reactions and particularly to the preparation of tetra-substituted cyclic olefins via a ring-closing metathesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.