3-Methyl-2-buten-1-OL → 3,7-Dimethylocta-2,6-Dienal
Reaction equation
[CH3:1][C:2]([CH3:6])=[CH:3][CH2:4][OH:5].[CH3:7][C:8]([CH3:12])=[CH:9][CH:10]=O>O>[CH3:7][C:8](=[CH:9][CH2:10][CH2:1][C:2](=[CH:3][CH:4]=[O:5])[CH3:6])[CH3:12]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 140 °C
Procedure
Air is blown for five minutes through a mixture of 100 parts of 3-methyl-2-buten-1-ol (prenol) and 100 parts of 3,3-dimethylacrolein. The reaction mixture containing peroxide is then heated for six hours at 140° C. The water formed in the reaction is removed continuously by injecting pentane into the reaction chamber. The reaction product is worked up by distillation. 59.2 parts of citral having a boiling point of 103° to 106° C. at 12 mm is obtained, equivalent to a yield of 76% of theory based on 3,3-dimethylacrolein at a conversion of 43%.
Workup
- customis removed continuously
- distillationThe reaction product is worked up by distillation
Sources & evidence
- ORD record
- ord-9966891101264eeb975046b4bc0cccbd
- Source dataset
- uspto-grants-1977_05
- Patent number
- US04021411
Reaction notes
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