Olefin metathesis initiators bearing thiazol-2-ylidene ligands

Details Olefin metathesis initiators bearing thiazol-2-ylidene ligands Olefin metathesis initiators bearing thiazol-2-ylidene ligands

2007-11-20

2011-10-18

Teskin, Fred M (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C548S103000, C556S021000, C556S136000, C560S127000, C560S261000, C585S366000, C585S643000

Reexamination Certificate

active

08039566

ABSTRACT:
This invention relates to olefin metathesis catalysts general formula (I):having a thiazol-2-ylidene ligand of general formula (II):The catalysts have been found to be particularly good initiators of (a) ring-closing metathesis reactions used to prepare tetra-substituted cyclic olefins, and (b) cross-metathesis reactions used to prepare tri-substituted and di-substituted olefins.

REFERENCES:
patent: 6525125 (2003-02-01), Giardello et al.
patent: 7034096 (2006-04-01), Choi et al.
patent: 7687635 (2010-03-01), Verpoort et al.
patent: 03/087167 (2003-10-01), None
patent: 2005/094345 (2005-10-01), None
Green et al, Chemistry of the Metal Carbonyls . . . Carbene(tetracarbonyl)-iron and -osmium Complexes containing Thiazolidinylidene and Related Ligands, J.C.S. Dalton: Inorg. Chem. (1972-1999) (1975), 10, 939-43.

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