HuagongsheHuagongshe Chemie-Druckbericht · Nur für Forschungszwecke
1,2-Dimethylhydrazine → 3-Hydroxy-1,2,4-trimethyl-5-pyrazolone
Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|---|---|---|
| Edukt | 1,2-Dimethylhydrazine | HCID 1322 | — |
| Edukt | Diethyl methylmalonate | HCID 11857 | — |
| Edukt | Sodium Methoxide | HCID 10942334 | — |
| Lösungsmittel | Methanol | HCID 887 | — |
| Produkt | 3-Hydroxy-1,2,4-trimethyl-5-pyrazolone | HCID 12818853 | — |
Reaktionsschritte
Diethyl methylmalonate and N,N'-dimethylhydrazine are heated under reflux for 170 hours in methanol in the presence of sodium methylate under an atmosphere of nitrogen. 3-Hydroxy-1,2,4-trimethyl-5-pyrazolone is obtained in the form of colorless crystals which, after recrystallization from ethyl acetate, melt at 87°-89° C.
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patentnummer | US04608383 |
| Quelldatensatz | uspto-grants-1986_08 |
| ORD ID | ord-da58efdd8cfd44639ad1ce4e0173a134 |
| Quellennotiz | uspto-grants-1986_08 |