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A novel Brфnsted acidic ionic liquid(IL)based on the cyclic guanidinium cation has been synthesized.This IL,as a strong Brфnsted acid catalyst or solvent,shows high catalytic activity and biphsaic behavor in the esterifications of carboxylic acids and alcohols.The produced esters as a separate phase can be conveniently decanted out from the IL and the IL is recyclable without any loss of catalytic activity.
A novel Br? Nsted acidic ionic liquid (IL) based on the cyclic guanidinium cation has been synthesized. This IL, as a strong Br? Nsted acid catalyst or solvent, shows high catalytic activity and biphsaic behavor in the esterifications of carboxylic acids and alcohols. as a separate phase can be conveniently decanted out from the IL and the IL is recyclable without any loss of catalytic activity.