Patent ID: 8361922
Filing Date: 2013-01-29
Classification: B01J,C07F,C08G

Abstract:
1. A ring-closing metathesis reaction method for preparing a tetra-substituted cyclic olefin comprising the step of: contacting an olefinic compound having at least two terminal olefins that are substituted at the beta-carbon of each terminal olefin with an N-heterocyclic carbene (NHC) ruthenium olefin metathesis catalyst 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 least one ortho or meta position under metathesis conditions to form a cyclic tetra-substituted olefin.