Synthesis of some new substituted triazolo [4,3- a][1,4] benzodiazepine derivatives as potent anticonvulsants

Novel 8-chloro-6-(2-fluorophenyl)-1-(aryl)-4 H-[1,2,4]triazolo[4,3- a][1,4]benzodiazepines ( 5a–f) were prepared by treating 7-chloro-5-(2-fluorophenyl)-1,3-dihydro-2 H-1,4-benzodiazepine-2-thione with various aromatic acid hydrazides. The newly prepared compounds were characterized by spectral analysis. Compounds were tested for anticonvulsant activity. Four of the tested compounds such as 5a, 5d, 5e and 5f exhibited excellent anticonvulsant activity in comparison with standard drug, diazepam. Few novel 8-chloro-6-(2-fluorophenyl)-1-(aryl)-4 H-[1,2,4]triazolo[4,3- a][1,4] benzodiazepine ( 5a-f) have been synthesized and characterized by spectral analysis. All the compounds have been screened for anticonvulsant activity. Four of the tested compounds have exhibited promising anticonvulsant activity.