Method of separating stereoisomers of dicarboxylic acid having norbornene or norbornane structure, or derivative thereof

摘要

A method of efficiently extracting a high-purity stereoisomer from a mixture comprising the endo isomer and the exo isomer of a dicarboxylic acid having a norbornene or norbornane structure, or a derivative thereof. The present invention relates to a method of separating the endo isomer and the exo isomer of a dicarboxylic acid represented by a general formula (1) or (2) or a derivative thereof, and includes the step of stirring and mixing a mixture comprising mainly the endo isomer of the dicarboxylic acid represented by the general formula (1) or (2) or a derivative thereof, and the exo isomer of the dicarboxylic acid represented by the general formula (1) or (2) or a derivative thereof, with a basic compound and a solvent. (wherein, R₁ to R₈ represent a hydrogen atom, methyl group, ethyl group, or butyl group), (wherein, R'₁ to R'₁₀ represent a hydrogen atom, methyl group, ethyl group, or butyl group)