A one-step synthesis of 4,8-dibromobenzo[1,2-c;4,5-c′]bis[1,2,5]thiadiazole with use of 1,2,4,5-tetraaminobenzene tetrahydrobromide and thionyl bromide in good yield is reported. This unit can then be used in the synthesis of low bandgap materials via palladium-catalyzed coupling reactions. The approach offers a quick and easy way to prepare low bandgap materials as compared to the current literature methods.

中文翻译：

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一锅合成4,8-二溴苯并[1,2- c ; 4,5- c ']双[1,2,5]噻二唑

使用1,2,4,5-四氨基苯四氢溴化物和亚硫酰溴一步合成4,8-二溴苯并[1,2- c ; 4,5- c ']双[1,2,5]噻二唑据报道收率很高。然后，该单元可用于通过钯催化的偶联反应合成低带隙材料。与当前的文献方法相比，该方法提供了一种快速且容易的方法来制备低带隙的材料。