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LiClO4 is used as catalyst for direct Mannich-type reaction of aryl aldehydes, aryl amines, and diethyl malonic ester under solvent-free conditions. This three-component reaction afforded the corresponding β-amino esters in good yields with simple and environmentally benign procedure.
a Conversion yields.
b No reaction.
a Conversion yields.
b Calculated by the 1H NMR spectrum.
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