.

Reaction of the latter compounds with secondary

amines in ethanol gave a family of new 5,7-diamino-

5,11-dihydropyrimido[5,4- e ][1,4]benzothiazepines....

>
. Due to their wide range of biological, industrial, and synthetic applications, in this study, we reportthe synthesis of new derivatives of imidazo[2,1-b]pyrimido[5,4-e][1,3,4]thiadiazine 3(a-e) from the reaction of 5-boromo-2,4-dichloro-6-methyl...

quantitatively the desired heterocyclized pyridazino[6,1­ c]pyrimido[5,4­e][1,2,4]triazine derivative as a novel heterocyclic system. Eventually, the reaction of it with various secondary amines obtained new derivatives of pyridazino[6,1­c]pyrimido[5,4­ e][1...

pyrimido[5, 4-e][1,3,4] thiadiazines or pyrimido[4, 5-e][1,3,4] thiadiazines?...

Several derivatives of the novel pyridazino[6,1-c]pyrimido[5,4-e][1,2,4]triazine ring system have been synthesised through heterocyclisation of 5-bromo-2,4-dichloro-6-methylpyrimidine with 3-chloro-6-hydrazinylpyridazine followed by treatment...

New 10H-benzo[b]pyridazino[3,4-e][1,4]thiazines were prepared and evaluated for inhibitory activity against soybean 15-lipoxygenase enzyme. These compounds were synthesized by the sequential treatment of 4-bromo-3,6-dichloropyridazine with 2...

A new series of 3-methyl-6-[1-(pyrimidin-4-yl)ethyl]-5H-pyrimido[5,4-e][1,2,4]triazolo[3,4-b][1,3,4]thiadiazine derivatives was synthesised through the condensation reaction of 5-bromo-4-[1-(5-bromo-2,6-dichloropyrimidin-4-yl)ethyl]-2-chloro-6...

Several new derivatives of 5,5′-(ethane-1,2-diyl)bis(3-((5-bromo-6-methyl-2-tertiaryamino pyrimidin-4yl)thio)-4H-1,2,4-triazol-4-amine)(4a–f) and their novel cyclized products, 1,2-bis(pyrimido[5,4-e][1,2,4]

triazolo[3,4-b][1,3,4]thiadiazin-3...