A method of producing a compound represented by the following general formula (3):
[wherein R is a bivalent aliphatic group having a carbon number of 1-16 or a bivalent aromatic group], which comprises a step (i) of reacting a compound represented by the following general formula (1):
with a carboxylic acid halide represented by the following general formula (2):
[wherein R is a bivalent aliphatic group having a carbon number of 1-16 or a bivalent aromatic group and X is a halogen atom] in the presence of a basic compound to form an ester, and a step (ii) of conducting a heat treatment after the step (i) to decompose an oligomer in the ester.
生产以下通用式(3)所代表的化合物的方法:[其中R是具有1-16个碳原子数的二价脂肪族基或二价芳香族基],包括以下步骤:(i)将以下通用式(1)所代表的化合物与以下通用式(2)所代表的
羧酸卤化物在碱性化合物存在下反应形成酯,以及(ii)在步骤(i)之后进行热处理以分解酯中的寡聚体。