Synthesis and biological action of some derivatives of pyrido-[1,4]-diazepine and pyrido-[2,3-d]-pyrimidine.

The following novel compounds were synthesized: 1H-2, 3, 4, 9-tetrahydropyrido-[2, 3-e] [1, 4]-diazepino-2, 3, 9-trione 1a, 2-methyl-3, 4-dihydropyrido-[2, 3-d]-pyrimidin-4-one 2a, and their derivatives: N-methylmorpholino 1b and 2b, N-methylpiperidino 1c and 2c, N-(beta-hydroxy-gamma-morpholinopropyl) 1d and 2d, N-(beta-diethylaminoethyl) 1e and 2e, and 2-styryl 3a, 2-p-chlorotyryl 3b, and 3', 4', 5'-trimethoxystyryl 3c. The most potent hypotensive action was exerted by compound 2c (in a dose of 10 mg/kg), 2d (30 mg/kg), and 3a-3c (50 mg/kg).