Recyclable metathesis catalysts

B - Operations – Transporting – 01 – J

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B01J 31/00 (2006.01) B01J 31/22 (2006.01) B01J 31/24 (2006.01) B01J 37/02 (2006.01) C07F 7/08 (2006.01) C07F 9/28 (2006.01) C07F 15/00 (2006.01) C08F 290/00 (2006.01) C08G 83/00 (2006.01) C08L 51/04 (2006.01) C08L 51/08 (2006.01) B01J 23/46 (2006.01) B01J 31/28 (2006.01)

Patent

CA 2419485

Hyghly active, recoverable and recyclable transition metal-based metathesis catalysts and their organometallic complexes including dendrimeric complexes are disclosed, including a Ru complex bearing a 1,3-dimesityl-4,5- dihydroimidazol-2-ylidene and styrenyl ether ligand. The heterocyclic ligand significantly enhances the catalytic activity, and the styrenyl ether allows for the easy recovery of the Ru complex. Derivatized catalysts capable of being immobilized on substrate surfaces are also disclosed. The present catalysts can be used to catalyze ring-closing metathesis (RCM), ring-opening (ROM) and cross metatheses (CM) reactions, and promote the efficient formation of various trisubstituted olefins at ambient temperature in high yield.

La présente invention concerne des catalyseurs de métathèse fortement actifs, à base de métaux de transition récupérables et recyclables ainsi que leurs complexes organométalliques comprenant des complexes dendrimères, y compris un complexe Ru portant un ligand 1,3-dimesityl-4,5-dihydroimidazol-2-ylidène et éther de styrényle. Le ligand hétérocyclique améliore significativement l'activité catalytique et l'éther de styrényle permet de récupérer facilement le complexe Ru. L'invention concerne également des catalyseurs dérivés qui peuvent être immobilisés sur des surfaces de substrats. Les catalyseurs selon l'invention peuvent être utilisés pour catalyser la métathèse de fermeture d'anneau, les réactions de métathèse d'ouverture d'anneau et de métathèses croisées et pour favoriser la formation efficace de diverses oléfines trisubstituées à température ambiante à un rendement élevé.

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