HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1580179Generated: October 31, 2026
p-Toluenesulfonic acid → 4,8-Dimethylnona-3,7-dien-2-one
https://huagongshe.com/reaction/1580179
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | p-Toluenesulfonic acid | HCID 6101 | — |
| Reactant | 3-Methyl-2-buten-1-OL | HCID 11173 | — |
| Reactant | Sodium ethoxide | HCID 2723922 | — |
| Reactant | HCID 21565215 | HCID 21565215 | — |
| Solvent | Ethanol | HCID 702 | — |
| Product | 4,8-Dimethylnona-3,7-dien-2-one | HCID 549663 | 86% |
Reaction Steps
A mixture of 100 parts of 4-methyl-2,2,4-triethoxypentane, 40 parts of prenol and 0.08 part of p-toluenesulfonic acid is heated for 6 hours at 140°C, the ethyl alcohol formed being distilled off continuously. On completion of the reaction, the reaction mixture is neutralized with sodium ethoxide and the reaction product is fractionally distilled. There are obtained 45.2 parts of 4,8-dimethyl-3,7-nonadien-2-one, equivalent to a yield of 86% and a conversion of 68% based on prenol.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US03932462 |
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| Source dataset | uspto-grants-1976_01 |
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| ORD ID | ord-590c99b752354972953087de2282b226 |
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| Source note | uspto-grants-1976_01 |
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