Patent ID: 8124313

Claim:
A method of producing a compound represented by general formula (I-11) shown below, comprising subjecting a compound (I-3) represented by general formula (I-3) shown below and a compound (I-4) represented by general formula (I-4) shown below to dehydration/condensation in the presence of an acidic catalyst: wherein A′ represents an alkylene group of 1 to 5 carbon atoms, —O—, —S—, —O—R 3 — or —S—R 4 —, wherein each of R 3 and R 4 independently represents an alkylene group of 1 to 5 carbon atoms; R 2 represents an alkyl group of 1 to 6 carbon atoms, an alkoxy group of 1 to 6 carbon atoms, a halogenated alkyl group of 1 to 6 carbon atoms, a halogen atom, a hydroxyl group, —COOR″, —OC(═O)R″, a hydroxyalkyl group or a cyano group; a represents an integer of 0 to 2; b represents an integer of 0 to 5; Y 1 represents an alkylene group which may have a substituent or a fluorinated alkylene group which may have a substituent; and M + represents an alkali metal ion.