Arylidenemalononitriles in heterocyclic syntheses: a novel synthesis of pyrido[2,3-d]pyrimidines
Abstract
Arylidenemalononitriles react with 6-amino and 6-hydroxyamino-1,3-dimethyl- and 3-methyl-pyrimidine-2,4(1H,3H)-dione to give pyrido[2,3-d]pyrimidines in good yields.