3-methyl coumarin
3-methyl coumarin
CAS: 2445-82-1
Molecular Formula: C10H8O2
3-methyl coumarin - Names and Identifiers
3-methyl coumarin - Physico-chemical Properties
| Molecular Formula | C10H8O2 |
| Molar Mass | 160.17 |
| Density | 1.0924 (rough estimate) |
| Melting Point | 91°C |
| Boling Point | 292.5°C (estimate) |
| Refractive Index | 1.5300 (estimate) |
| Physical and Chemical Properties | White crystals. The melting point was 91 °c and the boiling point was 292.5 °c. Soluble in alcohol, slightly soluble in water. |
3-methyl coumarin - Reference Information
| Use | This product has a vanilla fragrance for spices and cosmetics. It is also used as an intermediate in organic synthesis. |
| production method | prepared by reaction of salicylaldehyde with propionic anhydride. The cyclization reaction of salicylaldehyde and propionic anhydride is carried out in the presence of sodium propionate and iodine tablets. After reacting at 140 ℃ for 2H, the water and propionic acid are distilled at 120 ℃, and then heated to 220-230 ℃ for 4H, the reaction was poured into ice water and the crystals were cooled. Water was then added to dissolve, and propionic acid and iodine were removed with sodium sulfonate to pH 7-8. The crude product is obtained by cooling and crystallizing, and the final product is obtained by recrystallization from ethanol. |
Last Update：2024-04-09 20:49:11
