Patent ID: 7244859

Claim:
A method for producing a δ-aminopentadienoate compound of the following formula (1), the method comprising the step of; reacting a streptocyanine compound of the following formula (2) with an ester compound of the following formula (3) in the presence of an organic base, wherein in formulae (1)-(3), R 1 is at least one selected from the group consisting of an alkyl group and an aryl group; R 2 , R 3 , R 4 and R 5 independently represent at least one selected from the group consisting of a hydrogen atom and an alkyl group; at least one of R 2 and R 3 , and R 4 and R 5 may bond to each other to form a ring; Y represents an electron attractive group which is at least one selected from the group consisting of an alkylsulfonyl group, an arylsulfonyl group, an arylcarbonyl group, an aryloxycarbonyl group, a formyl group, a trifluoromethoxy group, a trifluoromethylthio group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkylsulfinyl group, an arylsulfinyl group, an alkylsulfamoyl group, an arylsulfamoyl group, and a trifluoromethyl group; X represents an acid radical; n indicates one of 0 and a positive number of no more than 5.