Synthesis of poly(ethylene glycol) (PEG) functionalized ionic liquids and the application to hydrosilylation

摘要

Novel poly(ethylene glycol) (PEG) functionalized ionic liquid (mPEGBImPF5) was prepared by alkylation of 1-butylimidazole with monomethoxy PEG methanesulfonate followed by anion exchange and used as a reaction medium for the hydrosilylation of different alkenes with triethoxysilane. It was found that both the conversion and selectivity of β-product of these hydrosilylation reactions could be improved in mPEGBImPF6. Compared with the unfunctionalized ionic liquid, 1-butyl-3-methylimidazolium hexa-fluorophosphate and common organic solvents, mPEGBImPF6 provided enhanced catalytic activity and selectivity for the hydrosilylation of styrene with triethoxysilane.