a series of cyclic analogues of bioactive thiosemicarbazide derivatives have been synthesized as potential antimycobacterial agents. the 4-amino-1,2,4-triazole-5-thione analogues (ia-f) were prepared by heating a mixture of thiocarbohydrzide and appropriate carboxylic acids. reaction of thiocarbohydrazide with γ-ketoesters in the presence of sodium methoxide furnished triazolopyridazine derivat...

A series of cyclic analogues of bioactive thiosemicarbazide derivatives have been synthesized as potential antimycobacterial agents. The 4-amino-1,2,4-triazole-5-thione analogues (Ia-f) were prepared by heating a mixture of thiocarbohydrzide and appropriate carboxylic acids. Reaction of thiocarbohydrazide with γ-ketoesters in the presence of sodium methoxide furnished triazolopyridazine derivat...

A number of 1,4-dihydropyridine derivatives (9a?d, 10a?d and 11a?d) were designed synthesized by the reaction 1,3,4-oxadiazole-5-thiones 1,2,4-triazole-5-thiones to 2,6-dibromomethyl-3,5-diethoxycarbonyl-4-(3- -nitrophenyl)-1,4-dihydropyridine. The compounds characterized using FT-IR, 1H-NMR, 13C-NMR spectral data, ESI-MS elemental analysis. cytotoxicity was evaluated in human breast cancer (MC...

A series of cyclic analogues of bioactive thiosemicarbazide derivatives have been synthesized as potential antimycobacterial agents. The 4-amino-1,2,4-triazole-5-thione analogues (Ia-f) were prepared by heating a mixture of thiocarbohydrzide and appropriate carboxylic acids. Reaction of thiocarbohydrazide with γ-ketoesters in the presence of sodium methoxide furnished triazolopyridazine derivat...

A series of cyclic analogues of bioactive thiosemicarbazide derivatives have been synthesized as potential antimycobacterial agents. The 4-amino-1,2,4-triazole-5-thione analogues (Ia-f) were prepared by heating a mixture of thiocarbohydrzide and appropriate carboxylic acids. Reaction of thiocarbohydrazide with γ-ketoesters in the presence of sodium methoxide furnished triazolopyridazine derivat...

A series of 4-amino-3-[[2-[4-(2-methoxyphenyl)-1-piperazinyl]ethyl]thio]-5-(substituted phenyl)[1,2,4]triazoles (5a-f) and the isomeric 4-amino-2-[2-[4-(2-methoxyphenyl)-1piperazinyl]ethyl]-5-(substitutedphenyl)-2,4-dihydro-3H[1,2,4]triazole-3-thiones (6a-f) and a series of 3-[[2-[4-(2-methoxy or 2-nitrophenyl)1-piperazinyl]ethyl]thio]-5-(substituted phenyl)[1,2,4]triazoles (8a-i) were synthesi...

The paper describes a convenient method for the preparation of 4-substituted phenyl-5-[1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-yl]-2H-1,2,4-triazole-3-thiones. The structures of the synthesized compounds are established by the results of LCMS, (1)H NMR, (13)C NMR, and IR and elemental analyses. The mercaptotriazoles are indicated to be in thione form by (1)H NMR spectra. All the synthesiz...

A series of triazenes derived from 5-(4-aminophenyl)-2,4-dihydro–4-substituted-3H-1,2,4-triazole-3-thiones 1a-c, aminoglutethimide or para-aminobenzoic acid have been synthesized for in vitro anticancer properties against three cell lines. The selected compounds; 1,3-bis[4(4-methyl-2,4-dihydro-3H-1,2,4-triazole-3-thioxo-5-yl)phenyl]-3H-triazene 2a, 1,3-bis[4(4-ethyl-2,4-dihydro-3H-1,2,4-triazol...

BACKGROUND 1,2,4-Triazoles and 1,2,3-triazoles have gained significant importance in medicinal chemistry. RESULTS This study describes a green, efficient and quick solvent free click synthesis of new 1,2,3-triazole-4,5-diesters carrying a lipophilic side chain via 1,3-dipolar cycloaddition of diethylacetylene dicarboxylate with different surfactant azides. Further structural modifications of ...

The reaction of 5-(1-adamantyl)-4-amino-3-mercapto-1,2,4-triazole (5) with various aromatic aldehydes in ethanol or acetic acid yielded the corresponding 4-arylideneamino derivatives 6a-v. Treatment of the 4-(2,6-difluoro- and dichlorobenzylideneamino) derivatives 6o and 6q with 1-substituted piperazines, and formaldehyde solution in ethanol afforded good yields of the corresponding 5-(1-adaman...