Methyl pyruvate → 5,7-diamino-1,3-dimethylpyrimido(4,5-c)pyridazin-4(1H)-one

HRID 127190Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 127190
[NH2:1][C:2]1[N:7]=[C:6]([NH2:8])[CH:5]=[C:4]([N:9]([CH3:11])[NH2:10])[N:3]=1.[C:12](OC)(=[O:16])[C:13]([CH3:15])=O>CO>[NH2:8][C:6]1[C:5]2[C:12](=[O:16])[C:13]([CH3:15])=[N:10][N:9]([CH3:11])[C:4]=2[N:3]=[C:2]([NH2:1])[N:7]=1

Komponenten

4

Edukt 2

HCID 11748Methyl pyruvateHCID 124630642,4-Diamino-6-(1-methylhydrazino)pyrimidine

Produkt 1

HCID 124630735,7-diamino-1,3-dimethylpyrimido(4,5-c)pyridazin-4(1H)-oneAusbeute 76 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

To a refluxing solution of 2,4-diamino-6-(1-methylhydrazino)-pyrimidine (500 mg) in anhydrous methanol (15 ml) was added methyl pyruvate (496 mg) over a five minute period. Reflux was continued for 5 hours after which time the solid which had separated was collected by suction filtration of the hot mixture, washed with methanol, and dried under vacuum at 70° C. to yield tan crystals of 5,7-diamino-1,3-dimethylpyrimido [4,5-c]pyridazin-4(1H)-one (508 mg; 76% of theoretical yield; M.P.>275° C.)

Aufarbeitung

  1. temperatureReflux
  2. customafter which time the solid which had separated
  3. filtrationwas collected by suction filtration of the hot mixture
  4. washwashed with methanol
  5. customdried under vacuum at 70° C.

Quellen und Nachweise

ORD-Eintrag
ord-74efd690c2284a6fbbca81fd2e226350
Quelldatensatz
uspto-grants-1981_03
Patentnummer
US04255427

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