Synthesis of a Novel Acceptor Unit for D-A Type Polymers: 4,8-Dibromobenzo-[1,2-<i>c</i>;4,5-<i>c′</i>]bis[1,2,5]thiadiazole

A synthetic approach to synthesize 4,8-Dibromobenzo-[1,2-c;4,5-c’] bis[1,2,5]thiadiazole from a common precursor 2,1,3-Benzothiadiazole is reported. This unit can then be used in the synthesis of low bandgap materials via palladium-catalyzed coupling reactions.