Abstract d, l??Proline was found to efficiently catalyze the one??pot condensation of aromatic aldehydes, malononitrile, and dimedone (1, 3??cyclohexanedione or 3??methyl??1??phenyl??2?? pyrazolin??5??one) 2??Amino??3??cycano??4??aryl??7, 7??dimethyl??5, 6, 7, 8??tetrahydrobenzo [b]