Synthesis and antimicrobial evaluation of certain purine, benzothiazole and thiazole systems substituted with dialkylaminoalkyl-o-cresols

Novel series of dialkylaminoalkyl- o -cresols incorporated with purine nucleus 2a–b , benzothiazole nucleus 5a–b , 8a–b and thiazole nucleus 11a–d , 13a–d were synthesized through Mannich reaction. Structures of the newly synthesized compounds have been deduced on the basis of elemental analysis and spectral data. Antimicrobial activity evaluation was carried out for all synthesized compounds; most of them exerted comparable activity to ciprofloxacin and flucanazole. The thiazole derivatives 11a , 13c , 13d are the most potent compounds.