HuagongsheHuagongshe Chemistry Print Report · For research reference only
3-Methyl-2-butenoic acid → 4,8-Dimethylnona-3,7-dien-2-one
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | 3-Methyl-2-butenoic acid | HCID 10931 | — |
| Reactant | 3-Methyl-2-buten-1-OL | HCID 11173 | — |
| Reactant | 4-Methyl-2,4-pentadien-2-yl acetate | HCID 54555518 | — |
| Solvent | Acetic Acid | HCID 176 | — |
| Product | 4,8-Dimethylnona-3,7-dien-2-one | HCID 549663 | 86% |
Reaction Steps
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).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US03932462 |
| Source dataset | uspto-grants-1976_01 |
| ORD ID | ord-272906040c7b45019dc23071b435746f |
| Source note | uspto-grants-1976_01 |