FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing dimethyl ether of 2,5-thiophene dicarboxylic acid, 
, which involves reaction of 2-thiophene carboxylic acid with methanol and CCl4 in the presence of a catalyst tris(2,4-pentanedionato)iron Fe(acac)3, activated with a nitrogen-containing ligand - pyridine with molar ratio [Fe(acac)3] : [C5H5N] : [2-thiophene carboxylic acid] : [methanol] : [CCl4]=0.01:0.05-0.1:1:45-135:30, at temperature of 140-160°C for 3-6 hours.
EFFECT: high output of dimethyl ether of 2,5-thiophene dicarboxylic acid which is the base material for production of electroconductive polymers, electrodes, sensors, capacitors, displays, gel electrolytes, ion-exchange membranes and optical bleaching agents.
1 cl, 1 tbl, 1 ex
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