HuagongsheHuagongshe Chemie-Druckbericht · Nur für Forschungszwecke
Benzene → Acetic Anhydride
Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|---|---|---|
| Edukt | Benzene | HCID 241 | — |
| Edukt | Methanol | HCID 887 | — |
| Edukt | Toluene | HCID 1140 | — |
| Edukt | 3,5-Diacetyl-2,6-dihydroxy-4h-pyran-4-one | HCID 135465969 | — |
| Lösungsmittel | Sulfuric Acid | HCID 1118 | — |
| Produkt | Acetic Anhydride | HCID 7918 | — |
| Produkt | Acetonedicarboxylic acid | HCID 68328 | — |
| Produkt | 3,5-Diacetyl-2,6-dihydroxy-4h-pyran-4-one | HCID 135465969 | — |
Reaktionsschritte
The starting materials of formula II above used herein are generally prepared by reaction of 3,5-diacetyl-4,6-dihydroxy-2H-pyran-2-one with the appropriate amine (RNH2). The reactants are usually heated at reflux in an inert organic solvent such as benzene, toluene or methanol for from two to twelve hours. 3,5-Diacetyl-4,6-dihydroxy-2H-pyran-2-one is obtained by reaction of acetonedicarboxylic acid and acetic anhydride in sulfuric acid at elevated temperature.
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patentnummer | US04017633 |
| Quelldatensatz | uspto-grants-1977_04 |
| ORD ID | ord-a4080139efa24d0e88eb74d17b34b454 |
| Quellennotiz | uspto-grants-1977_04 |