| 摘要 |
PURPOSE:To obtain d-4-cyclopentenones useful as an intermediate for perfume, drugs, etc., agricultural chemicals, etc., by hydrolyzing a dl-4-cyclo-pentenone with a bacterium (enzyme obtained from it) belonging to the genus Pseudomonas. CONSTITUTION:A dl-4-cyclopentenone shown by the formula I (R1 is alkyl, alkenyl, or alkynyl) is treated with a bacterium belonging to the genus Pseudomonas or an enzyme obtained from it. Only the l form of the dl form shown by the formula I is hydrolyzed, to give d-2-substituted-3-hydroxy-3-methyl-4-cyclopentenone shown by the formula II(R is hydroxyl or acetoxyl) wherein R is hydroxyl group, and the d form of the dl form shown by the formula I is left as it is, to give-d-2-substituted -3-acetoxy-3-methyl-4-cyclopentenone shown by the formula II wherein R is acetoxyl group. |
