3-Methyl-2-butenoic acid → 4,8-Dimethylnona-3,7-dien-2-one
反応式
C([O:4][C:5](=[CH:7][C:8]([CH3:10])=[CH2:9])[CH3:6])(=O)C.[CH3:11][C:12]([CH3:16])=[CH:13][CH2:14]O.CC(C)=CC(O)=O>C(O)(=O)C>[CH3:6][C:5]([CH2:4][CH2:14][CH:13]=[C:12]([CH3:16])[CH3:11])=[CH:7][C:8](=[O:9])[CH3:10]参加物
5
実験手順
110 parts of 4-methyl-2,4-pentadien-2-yl acetate and 60 parts of prenol are heated with 1.4 parts of 3,3-dimethylacrylic acid at about 180°C for 4 hours in a small pressure column at a pressure of 2 atmospheres, the acetic acid formed being distilled off continuously. Fractional distillation of the reaction product gives 61.8 parts of 4,8-dimethyl-3,7-nonadien-2-one (yield 86% of theory, conversion 62% based on prenol).
後処理
- distillationbeing distilled off continuously
- distillationFractional distillation of the reaction product
出典と根拠
- ORDレコード
- ord-272906040c7b45019dc23071b435746f
- 出典データセット
- uspto-grants-1976_01
- 特許番号
- US03932462
反応ノート
読み込み中…