Journal of Heterocyclic Chemistry

Volume 12, Issue 2 pp. 427-431

9-Hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one, 9-hydroxy-2-phenyl- 4H-pyrido[1,2-a]pyrimidin-4-one, 9-methyl-2-phenyl-4H-pyrido[1,2-a]- pyrimidin-4-one, ethyl 9-hydroxy-4H-pyrido[1,2-a]pyrimidin-4-one-3- carboxylate and their derivatives