1-Methylimidazole → 3-[2-(Allyloxy)ethyl]-1-methylimidazolium bis(pentafluoroethyl)phosphinate

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Reaction Conditions

Reaction Steps

2-(Allyloxy)ethyl bis(pentafluoroethyl)phosphinate, (C2F5)2P(O)OCH2CH2—OCH2CH═CH2, (4.135 g; 10.7 mmol) is slowly added dropwise to dry and cooled (0° C.) N-methylimidazole (0.793 g; 9.7 mmol) (exothermic) in a 50 ml glass flask. A pale-yellow, more highly viscous solution forms spontaneously, which is stirred at 0° C. for 1.5 h, warmed and stirred at room temperature for 5 h. The readily volatile constituents are removed in vacuo (10−3 mbar) at room temperature. 3-[2-(Allyloxy)ethyl]-1-methylimidazolium bis(pentafluoroethyl)phosphinate, [CH2═CHCH2OCH2CH2MIM][(C2F5)2—P(O)O], (4.521 g; 9.7 mmol) is isolated as highly viscous, pale-yellow liquid in quantitative yield and a purity of 94%.

Provenance & Evidence