| 摘要 |
PROBLEM TO BE SOLVED: To provide a method in which thermally unstable cyclopentenolones are simply and effectively purified to a high-purity product, and are advantageously purified in terms of operability and cost effectiveness when implemented in an industrial scale. SOLUTION: The method for purifying cyclopentenolones comprises reacting cyclopentenolones (1) represented by general formula (1), wherein R<SP>1</SP>denotes alkyl, alkenyl, alkynyl or aralkyl; and R<SP>2</SP>denotes hydrogen or alkyl, with calcium chloride in the presence of an ester solvent, separating and obtaining a resultant cyclopentenolones (1)-calcium chloride adduct, and decomposing the adduct to recover cyclopentenolones (1). COPYRIGHT: (C)2003,JPO
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