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Aryl imines, derived in situ from aldehydes and amines, smoothly undergo addition with trimethylsilyl cyanide in 1-butyl-3-methylimidazolium tetrafluoroborate or 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquids under mild and neutral reaction conditions to afford the corresponding α-aminonitriles in excellent yields. The ionic liquids can be recycled in five to six runs without any apparent loss of activity.
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Yadav et al. (2003) studied this question.
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