Propionic Acid → 4,8-Dimethylnona-3,7-dien-2-one

반응식

[CH3:1][C:2]([CH3:14])=[CH:3][C:4]([O:10]C(=O)C)(OC(=O)C)[CH3:5].[CH3:15][C:16]([CH3:20])=[CH:17][CH2:18]O.C(O)(=O)CC>>[CH3:14][C:2]([CH2:1][CH2:18][CH:17]=[C:16]([CH3:20])[CH3:15])=[CH:3][C:4](=[O:10])[CH3:5]

참가 물질

반응물 3

HCID 1032Propionic Acid

HCID 111733-Methyl-2-buten-1-OL

HCID 215652104-Methyl-2,2-diacetoxy-3-pentene

생성물 1

HCID 5496634,8-Dimethylnona-3,7-dien-2-one수율 81%

반응 조건

온도: 200 °C

실험 절차

A mixture of 25 parts of 4-methyl-2,2-diacetoxy-3-pentene, 10 parts of 3-methyl-2-buten-1-ol (prenol) and 0.3 part of propionic acid is heated for 3 hours at about 200°C in a vibratory autoclave at a pressure 30 atmospheres. After cooling, the reaction product is distilled off to give 9.4 parts of 4,8-dimethyl-3,7-nonadien-2-one having a boiling point of 60°-62°C/0.2 mm. The yield is 81% of theory at a conversion of 60% based on the prenol introduced.