ALKYLIDENE COMPLEXES OF RUTHENIUM CONTAINING N-HETEROCYCLIC CARBENE LIGANDS; USE AS HIGHLY ACTIVE, SELECTIVE CATALYSTS FOR OLEFIN METATHESIS
申请人:Evonik Degussa GmbH
公开号:US20150038723A1
公开(公告)日:2015-02-05
Akylidene complexes of ruthenium containing N-heterocyclic carbene ligands and their use as highly active, selective catalysts for olefin metathesis
The invention relates to a complex of ruthenium of the structural formula I,
where X
1
and X
2
are identical or different and are each an anionic ligand,
R
1
and R
2
are identical or different and can also contain a ring, and R
1
and R
2
are each hydrogen or/and a hydrocarbon group,
the ligand L
1
is an N-heterocyclic carbene and the ligand L
2
is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphite, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether,
where R
1
, R
2
, R
3
and R
4
are hydrogen or/and hydrocarbon groups.
The invention further relates to a process for preparing acyclic olefins having two or more carbon atoms or/and cyclic olefins having four or more carbon atoms from acyclic olefins having two or more carbon atoms or/and from cyclic olefins having four or more carbon atoms by an olefin metathesis reaction in the presence of at least one catalyst, wherein a complex is used as catalyst and R′
1
, R′
2
, R′
3
and R′
4
are hydrogen or/and hydrocarbon groups.