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A sulfated choline‐based ionic liquid [Ch‐OSO3H] was prepared and used as a novel catalyst for the synthesis of α‐aminophosphonates via a one‐pot three‐component reaction with aldehydes, amines, and triethyl phosphite/diethyl phosphite at room temperature under solvent‐free conditions or in aqueous media. The reaction was completed in short times and products could be simply separated from the reaction...
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