New Two Component Catalytic System for ROMP of Cycloolefins: Ruthenium(methallyl)2(diphosphine) / Imidazolinium Salt

Autores: Ricardo Castarlenas, Cédric Fischmeister y Pierre H. Dixneuf Ref. revista: New Journal of Chemistry, 27, 215-216, (2003)

A new in-situ generated catalytic system for the ROMP of cycloalkenes is prepared by combination of Ru(methallyl)2
{Ph2P(CH2)nPPh2} (n ¼ 1, 2, 4, 6) and a bulky 1,3-bis(2,4,6-trimethylphenyl) imidazolinium salt. Cyclooctene is polymerised at 80 ºC for 20 min in 75–88% yield or at room temperature, after the activation of this catalytic system by preliminary heating at
80 ºC in chlorobenzene.