An efficient triethylamine-catalyzed synthesis of 4-amino-3,5-dicyano-6-arylphthalates is described. A one-pot, simple pseudo four-component reaction between arylaldehydes, dialkyl acetylenedicarboxylates, and twice as much malononitrile gave 4-amino-3,5-dicyano-6-arylphthalates in good to excellent yields. (C) 2013 Bagher Mohammadi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
1-Methylimidazole-Catalyzed Regioselective Synthesis of Highly Substituted Benzenes
A novel 1-methylimidazole-catalyzed synthesis of 4-amino-3,5-dicyano-6-arylphthalates is described. A one-pot, three-component reaction between arylidenemalononitriles, dialkyl acetylenedicarboxylates, and malononitrile gave highly substituted benzenes in good to excellent yields.