| 摘要 |
<p>A process for producing a 5-alkyl-Ϝ-butyrolactone represented by the following general formula (2): (2) wherein n is an integer of 4 or above; which comprises isomerizing a lactone represented by the following general formula (1): (1) wherein n is an integer of 4 or above; by bringing into contact with at least one acid selected from among sulfuric acid, sulfonic acid, an ion exchange resin having sulfonate group and heteropolyacid at 0 to 230°C. If needed, the thus obtained 5-alkyl-Ϝ-butyrolactone is brought into contact with at least one carbonate selected form among alkali metal carbonates and alkaline earth metal carbonates. Thus, a 5-alkyl-Ϝ-butyrolactone can be obtained at a relatively high yield with the use of a less expensive acid or a small amount of an acid without resort to any special reaction equipment. By treating the thus obtained 5-alkyl-Ϝ-butyrolactone with the carbonate as described above, 5-alkyl-Ϝ-butyrolactone with lessened odor can be obtained.</p> |
