| 摘要 |
A highly pure hydroquinone dietser derivative can be produced from the reaction product of ketoisophorone with an acylating agent in a high yield by a simple and easy operation. In the presence of an acid catalyst, a cyclohex-2-ene-1,4-dione derivative shown by the following formula (3) was allowed to react with an acylating agent (e.g., acetic anhydride), and the reaction product was purified by crystallization to obtain a hydroquinone diester derivative shown by the following formula (1). The compound (1) contains about 0 to 4% by weight of a catechol diester derivative represented by the following formula (2), being highly pure. As a solvent for crystallization, a mixed solvent of an organic carboxylic acid (e.g., acetic acid) corresponding to the acylating agent and water may be used. In the formulae, R1 and R2 each represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group.
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