Isobutyric Acid → Ethyl 5,9-dimethyl-3,4,8-decatrienoate

反応式

[C:1]([O-:7])([O-])([O:3][CH2:4][CH3:5])[CH3:2].[CH3:8][C:9]([CH3:18])=[CH:10][CH2:11][CH2:12][C:13](O)([C:15]#[CH:16])[CH3:14].C(O)(=O)C(C)C>>[CH3:14][C:13]([CH2:12][CH2:11][CH:10]=[C:9]([CH3:18])[CH3:8])=[C:15]=[CH:16][CH2:2][C:1]([O:3][CH2:4][CH3:5])=[O:7]

参加物

反応物 3

HCID 6590Isobutyric Acid

HCID 62842Dehydrolinalool

HCID 86598186Ethyl ortho-acetate

生成物 1

HCID 21515741Ethyl 5,9-dimethyl-3,4,8-decatrienoate収率 96%

実験手順

A mixture of 65.6 g of ethyl ortho-acetate, 30.4 g of dehydrolinalool and 1.5 g of isobutyric acid was reacted at 130° to 140°C. for 8 hours. Distillation was conducted after the reaction in the same manner as in the preceeding Examples, and a fraction boiling at 92 to 94°C. under 0.5 mm Hg was collected. Ethyl 5,9-dimethyl-3,4,8-decatrienoate was obtained in a yield of 96%.