Synthesis and activity of a new generation of ruthenium-based olefin metathesis catalysts coordinated with 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene ligands

Citation
M. Scholl et al., Synthesis and activity of a new generation of ruthenium-based olefin metathesis catalysts coordinated with 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene ligands, ORG LETT, 1(6), 1999, pp. 953-956
Citations number
37
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANIC LETTERS
ISSN journal
15237060 → ACNP
Volume
1
Issue
6
Year of publication
1999
Pages
953 - 956
Database
ISI
SICI code
1523-7060(19990923)1:6<953:SAAOAN>2.0.ZU;2-E
Abstract
[GRAPHICS] A new family of 1,3 dimesityl-4,5-dihydroimidazol-2-ylidene ruthenium based complexes 9a-c has been prepared starting from RuCl2(=CHPh)(PCy3)(2) 2. Th ese air and water tolerant complexes were shown to exhibit an increased rin g-closing metathesis activity at elevated temperature when compared to that of the parent complex 2 and the previously developed complex 3, In many in stances the activity of these complexes also rivaled or exceeded that of th e alkoxy-imido molybdenum complex 1. Catalyst loadings of as low as 0.05 mo l % could be used.