HuagongsheHuagongshe Chemie-Druckbericht · Nur für Forschungszwecke
3,4,5-Trimethoxybenzaldehyde → Tetrahydro-3,5-bis[(3,4,5-trimethoxyphenyl)methylene]-4H-pyran-4-one
Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|---|---|---|
| Edukt | 3,4,5-Trimethoxybenzaldehyde | HCID 6858 | — |
| Edukt | Tetrahydro-4H-pyran-4-one | HCID 121599 | — |
| Lösungsmittel | Hydrochloric Acid | HCID 313 | — |
| Lösungsmittel | Ethanol | HCID 702 | — |
| Produkt | Tetrahydro-3,5-bis[(3,4,5-trimethoxyphenyl)methylene]-4H-pyran-4-one | HCID 2740872 | — |
Reaktionsschritte
A solution of 6.0 g (0.06 mole) of tetrahydro-4H-pyran-4-one and 25 g (0.127 mole) of 3,4,5-trimethoxybenzaldehyde in 75 ml of EtOH and 10 ml of concentrated HCl is stirred and heated at reflux for 3 hours. The product gradually precipitates from the cooled solution. The yield of yellow crystals is 12.0 g (44%), m.p. 187°-189°.
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patentnummer | US04128648 |
| Quelldatensatz | uspto-grants-1978_12 |
| ORD ID | ord-48d5a20802204161ac721fb022201aab |
| Quellennotiz | uspto-grants-1978_12 |