Patent ID: 9278980
Filing Date: 2016-03-08
CPC Classification: C07D

Claim Text:
1. A method of producing a monomer comprising: dissolving 3-fluoro-4,6-dihydrothieno[3,4-b]thiophene in a solvent to create a solution, wherein the solvent is selected from the group consisting of: tetrahydrofuran, diethyl ether, hexane and combinations thereof; adding an initiator to the solution to produce an initiated solution; adding a fluorinated chemical to the initiated solution to produce 2,3-difluoro-4,6-dihydrothieno[3,4-b]thiophene; oxidizing 2,3-difluoro-4,6-dihydrothieno[3,4-b]thiophene with an oxidant to produce 2,3-difluorothieno[3,4-b]thiophene; brominating 2,3-difluorothieno[3,4-b]thiophene to produce 4,6-dibromo-2,3-difluorothieno[2,3-c]thiophene, debrominated 4,6-dibromo-2,3-difluorothieno[2,3-c]thiophene and adding an aryl group to produce the monomer wherein the aryl group Ar is selected from the group consisting of: and R1 is independently selected from the group consisting of an alkyl group, an alkoxy group, an aryl group and combinations thereof, and R2 is selected from an alkyl group, an alkoxy group, an aryl group and combinations thereof, and R3 is selected from the group consisting of an alkyl group, an alkoxy group, an aryl group and combinations thereof, Ar is and R1 is selected from the group consisting of an alkyl group, an alkoxy group, an aryl group and combinations thereof and R3 is selected from an alkyl group, an alkoxy group, an aryl group and combinations thereof, and R4 is selected from the group consisting of an alkyl group, an alkoxy group, an aromatic group and combinations thereof, and R5 is selected from the group consisting of alkyl group, alkoxy group, aromatic group and combinations thereof, Ar is R6 is selected from the group consisting of an alkyl group, an alkoxy group, an aromatic group and combinations thereof, R7 is selected from the group consisting of an alkyl group, an alkoxy group, an aromatic group and combinations thereof, R8 is selected from the group consisting of an alkyl group, an alkoxy group, an aromatic group and combinations thereof, R9 is selected from the group consisting of an alkyl group, an alkoxy group, an aromatic group and combinations thereof.