synthesized via one-potmulticomponent condensation of 1,3-indandione ( 1 ), thiosemicarbazide ( 2 ) and 3-(2-bromoacetyl)-2 H -chromen-2-ones ( 3a – f )/2-bromo-1-(4-substituted-phenyl)ethanone ( 5a – f ). All the synthesized compounds were characterized by spectral and elemental analyses. All the synthesized compounds were evaluated for their in vitro antimicrobialactivity. Antibacterial activity results