2,5-dibromo-3,4-ethylenedioxythiophene

Crystalline 2,5-dibromo-3,4-ethylenedioxythiophene, DBEDOT, is incubated at 60 °C for 24 h followed by drying under vacuum to remove excess of Br2. 

Example 5 Polymerization of 3,4-Ethylenedioxythiophene (EDOT) with 2,7-Dibromo-9,9-dioctylfluorene... 

Dibromination of 224 provided 2,5-dibromo-3,4-ethylenedioxythieno[2,3- ]thio-phene (225) as a pale yellow solid, StiUe cross-coupling of which with 2-tributylstaimyl-3,4-ethylenedioxythiophene (226) in the presence of Pd(PPh3)4 furnished 2,5-bis(3,4-ethylenedioxythiophene)-3,4-diethylenedioxythieno[2,3-6] thiophene (227) as a pale yellow solid, which was electropolymerized (Scheme 55) [76],... 

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