Patent ID: 11958042
Assignee: UMICORE AG & CO. KG
Field: Organic fine chemistry (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 2:
3. The method according to claim 2, wherein the olefin metathesis catalyst is represented by the structure of Formula (5),, wherein:
R1 is hydrogen;
R2 is unsubstituted phenyl, substituted phenyl, C1-C6 alkyl or substituted 1-propenyl; or R1 and R2 are linked together to form an optionally substituted indenylidene;
Ra is methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, or phenyl;
Rb is methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, or phenyl; or Ra and Rb are linked together to form a tetrahydrothiophene oxide with the sulfoxide group;
X1 and X2 are independently Cl, Br, F or I;
R3 is adamantyl, 2,4,6-trimethylphenyl, 2,6-di-iso-propylphenyl, 2-iso-propyl-6-methylphenyl, 2-iso-propyl-phenyl or 2-methyl-phenyl; and
R4 is 2,4,6-trimethylphenyl, 2,6-di-iso-propylphenyl, 2-iso-propyl-6-methylphenyl, 2-iso-propyl-phenyl or 2-methyl-phenyl.