Acetic Anhydride → 1-Methyl-4-oxo-5-pentylcyclopent-2-EN-1-YL acetate

反応式

[OH:1][C:2]1([CH3:13])[CH:6]=[CH:5][C:4](=[O:7])[CH:3]1[CH2:8][CH2:9][CH2:10][CH2:11][CH3:12].[C:14](OC(=O)C)(=[O:16])[CH3:15]>C(N(CC)CC)C>[C:14]([O:1][C:2]1([CH3:13])[CH:6]=[CH:5][C:4](=[O:7])[CH:3]1[CH2:8][CH2:9][CH2:10][CH2:11][CH3:12])(=[O:16])[CH3:15]

参加物

実験手順

Into the same flask as used in Example 1, dl-3-hydroxy-2-n-pentyl-3-methyl-4-cyclopentenone (18.2 g), triethylamine (0.1 g) and acetic anhydride (36 g) were charged, and the resultant mixture was stirred at 60°-80° C. for 3 hours. After completion of the reaction, the reaction mixture was subjected to the same work-up as in Example 1 to give 21.9 g of dl-3-acetoxy-2-n-pentyl-3-methyl-4-cyclopentenone. Yield, 98%. B.P., 100°-110° C./0.1-0.3 mmHg).