| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a dithienobenzodithiophene derivative using an easy to obtain material in a short process and in high yield, the derivative being an organic semiconductor material which provides high carrier mobility.SOLUTION: The method for producing a dithienobenzodithiophene derivative comprises at least the following steps (A) to (D): step (A) of producing 1,4-bis(2-substituted-5-thienyl)-2,5-dihalobenzene by a reaction of 2-substituted-5-thienyl metal derivative and 1,2,4,5-tetrahalobenzene in the presence of a palladium catalyst and/or a nickel catalyst; step (B) of producing 1,4-bis(2-substituted-5-thienyl)-2,5-bis(alkylsulfenyl)benzene by a reaction of an alkali metal thioalkoxide and the 1,4-bis(2-substituted-5-thienyl)-2,5-dihalobenzene obtained in the step (A); step (C) of producing 1,4-bis(2-substituted-5-thienyl)-2,5-bis(alkylsulfinyl)benzene by a reaction of an oxidant and the 1,4-bis(2-substituted-5-thienyl)-2,5-bis(alkylsulfenyl)benzene obtained in the step (B); step (D) of producing a dithienobenzodithiophene derivative by subjecting the 1,4-bis(2-substituted-5-thienyl)-2,5-bis(alkylsulfinyl)benzene obtained in the step (C) to a dealkylation reaction with an amine after a treatment with an acid having pKa of 2 or less. |
