Several derivatives of the novel benzo[b]pyrazolo[5′,1′:2,3]pyrimido[4,5-e][1,4]thiazine ring system have been synthesized through the one-pot cyclocondensation of 6-bromo-7-chloro-2-(ethylthio)5-methylpyrazolo[1,5-a]pyrimidine-3-carbonitrile (4...

the desired [1,2,4]triazolo[3ʹ,4ʹ:2,3]pyrimido[4,5-c]isothiazoles (3a-c)....

the corresponding N-(4-imino-8-alkyl-5-phenyl-4,5-dihydro[1,2,4]triazolo[3',4':2,3] pyrimido[4,5-c]isothiazolo-3-yl) N-phenylamine (3a-c). Reaction of 6-Hydrazinyl-4, 5-dihydro-4-imino-N,5-diphenylisothiazolo[3,4-d]pyrimidin-3-amine (2) with carbon disulphide...

H exchange inhibitors [3]. Due to the widespread biological activities of fused heterocyclic systems, in this study, we synthesized a novel benzo[b]pyrazolo[5\\',1\\':2,3]pyrimido[4,5­e][1,4]thiazine heterocyclic system. In our protocol, the desired compound...

to the synthesis of various

derivatives of pyrazolo[5\\'\\',1\\'\\':2\\',3\\']pyrimido[4\\',5\\':5,6][1,4]thiazino[2,3-b]quinoxaline as a

novel heterocyclic system. These potential pharmacologically active and fluorescent derivatives

(3a...