4077-47-8
2,5-Dimethyl-4-methoxy-3(2H)-furanone
CAS: 4077-47-8
Molecular Formula: C7H10O3
4077-47-8 - Names and Identifiers
4077-47-8 - Physico-chemical Properties
| Molecular Formula | C7H10O3 |
| Molar Mass | 142.15 |
| Density | 1.097g/mLat 25°C(lit.) |
| Boling Point | 63°C/0.3mmHg(lit.) |
| Flash Point | 167°F |
| JECFA Number | 1451 |
| Appearance | clear liquid |
| Specific Gravity | 1.097 |
| Color | Colorless to Yellow |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.478(lit.) |
4077-47-8 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | 22 - Harmful if swallowed |
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| HS Code | 29329990 |
4077-47-8 - Reference Information
| FEMA | 3664 | 2,5-DIMETHYL-4-METHOXY-3(2H)-FURANONE |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | furanone methyl ether is a kind of furanone flavor, which can be prepared from furanone and methanol into ether. There are reports in the literature that furanone methyl ether can be used to prepare organic OLED reagents used to prepare flavors |
| preparation | in a 1000 ml three-mouth bottle, add 300 grams of tetrahydrofuran and 26 grams of sodium hydride, stir and drop 120 grams of natural ethyl lactate when the temperature is reduced by 0~5 ℃, heat the reaction solution to 60 ℃ after 30 minutes of reaction, drop 74 grams of natural croton nitrile, reflux reaction after two hours of drop addition, the yield is 96%, and then the nitrilated furanone is oxidized with potassium peroxomonosulfate salt, and then refluxed with water as a solvent. A strong alkali anion exchange resin Dowex 2 was used for cleavage of keganitol to obtain furanone with 28% yield. 60 grams of natural equivalent furanone, 480 grams of natural methanol and 3 grams of p-toluenesulfonic acid obtained by the above method are taken, added into a 1000 ml three-mouth bottle, heated and refluxed for 8 hours, the reaction solution is reduced to room temperature, 90 grams of sodium bicarbonate is added, and sodium bicarbonate is filtered after stirring for 30 minutes. The methanol was distilled at normal pressure until there was no distillation, and furanone methyl ether was distilled at reduced pressure with 97% purity and 65% molar yield. |
Last Update：2024-04-10 22:29:15
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