The efficacy of [bmim][X] ionic liquids (ILs) (X = PF6-, BF4- and NTf2-) as reaction media for methyl oleate metathesis was compared with that of conventional organic solvents (PhCl, PhMe, DCM and DCE) using the well-defined first and second generation Grubbs precatalysts, RuCl2(PCy 3)(L)(=CHPh) (L = PCy3 or H2IMes). Best catalytic performance, with excellent selectivity (>98%) at moderate reaction temperatures, was achieved in [bmim][X] ILs compared to conventional solvents. The effects of anion, reaction temperature, solvent polarity, solvent viscosity, and ligand-anion interaction on the reaction are also addressed. © 2009 by the authors; licensee Molecular Diversity Preservation International.
- Methyl oleate
- RuCl(PCy)(L)(= CHPh)