| 摘要 |
A process for preparing cyclopentenone derivatives represented by the formula: <IMAGE> wherein R1 is methyl or ethyl, and R2 is hydrogen, methyl or acetyl, characterized in that a 1,4-diketone derivative represented by the formula: R1COCH2CH2COCH2OR2 wherein R1 and R2 are as defined above is cyclized in the presence of a basic catalyst. |
