Synthesis of Some Novel Heterocycles Bearing Thiadiazoles as Potent Anti-inflammatory and Analgesic Agents

2-Bromoacetyl-3-phenyl-1,3,4-thiadiazole derivative was synthesized and reacted with a number of heterocyclic amines to give a series of fused imidazole derivatives. Also, reaction of 2-bromoacetyl-3-phenyl-1,3,4-thiadiazole with o-phenylene diamine and 2-aminothiophenol yielded the respective products. Moreover, reaction of 2-bromoacetyl-3-phenyl-1,3,4-thiadiazole with thiourea, thiosemicarbazide, thiocarbahydrazide gave the respective thiazoles. The structures of all the novel products were elucidated on the basis of elemental analysis and spectral data. In addition, the biological activity of the newly synthesized compounds was evaluated, and the results obtained indicate their potency as anti-inflammatory, analgesic, and anti-ulcer agents. The binding mechanism of the most active compounds was studied using MOE to analyze the molecular interactions.