Approaching the Integer-Charge Transfer Regime in Molecularly Doped Oligothiophenes by Efficient Decarboxylative Cross-Coupling.A library of symmetrical linear oligothiophene was prepared employing decarboxylative cross-coupling reaction as the key transformation. 
decarboxylative cross-coupling reaction
Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or additives. 
potassium carboxylate salts
Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or additives. 
co-catalyst
Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or additives. 
base
Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or additives. 
additives