Convenient synthesis of new pyrimido[4,5-e][1,3,4]thiadiazine derivatives...

Convenient synthesis of pyrimido[4, 5-e][1,3,4] oxadiazines....

Pyrimido [4,5-e][1,3,4]thiadiazines have the ditinct biological activities which promoted us to make an unused method and derivatives for the synthesis of them. These compounds have the potential of being nucleoside analogues, [1...

New Route to pyrimido[4,5-e][1,3,4] thiadiazine Derivatives...

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...

One-pot synthesis of pyrimido[4,5-e][1,3,4]thiadiazines through heterocyclization of 5-bromo-2-chloro-6-methyl-4-(1-methylhydrazino) pyrimidine with arylisothiocyanates is reported....

. The substitution of chlorine atom with secondary amines was also investigated and the resulting products were cyclized on treatment with NaNH2 in CH3CN to give various new derivatives of 3,6-dimethyl-5H-pyrimido[4,5-e][1,2,4]triazolo[3,4b][1,3,4] thiadiazines....

the corresponding pyrimido[4,5e][1,2,4]triazolo[4,3-b][1,2,4]triazine3(a-c) in good yields.The structure of all the new synthesized compounds were confirmed by their spectral and microanalytical data....

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...

pyrimido[4,5-e][1,2,4]-triazolo[3,4-

b][1,3,4]-thiadiazine-7,9-diones have been synthesized by the condensation of 3-alkyl-4-

amino-5-mercapto-[1,2,4]-triazoles with 5-bromobarbituric acid.[2]

In continuation of our previous efforts...