ORGANOMETALLIC RUTHENIUM COMPLEXES AND RELATED METHODS FOR THE PREPARATION OF TETRA-SUBSTITUTED AND OTHER HINDERED OLEFINS

摘要

Click the invention when having a 5-membered heteroaromatic ring carbene carbon atom , and 5- membered heterocyclic containing at least one nitrogen atom contained in the ring, is bonded directly to the nitrogen atom and the carbene carbon atom is substituted by a phenyl ring and the phenyl ring is one that has a hydrogen on either or both of the ortho position is substituted in the ortho or meta position or more , to a ruthenium alkylidene complexes having an N- heterocyclic carbene ligand . The present invention also provides an olefin metathesis reaction , in particular , to the preparation of the ring-closed cyclic olefin metathesis when substituted with four (ring-closing metathesis). ;