Article
An Efficient Synthesis of Some Novel 3-Cyano-4-imino-2-(methylthio)4H-pyrido[1,2-a]pyrimidine and Their Derivatives
Abstract
Pyrazolo pyrimido pyrimidine (4a–k) was prepared by the reaction of compound 3-cyano-4-imino-2-(methylthio)4H-pyrido[1,2-a]pyrimidine (3) with hydrazine hydrate, phenyl hydrazine, 2-hydrazino benzothiazole, and 6-substituted hydrazine benzothiazole in N,N-dimethylformamide and anhydrous potassium carbonate. These synthesized compounds were characterized by elemental analysis IR, 1H NMR, and mass spectral data.
