Formamidine acetate → 5-methyl-2-oxo-1H-1,6-naphthyridine-3-carbonitrile

HRID 462710Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 462710
[C:1]([C:4]1[CH:5]=[C:6]([C:16]#[N:17])[C:7](=[O:15])[NH:8][C:9]=1[CH:10]=[CH:11][N:12](C)C)(=O)[CH3:2].C(O)(=O)C.C(N)=N>CN(C)C=O>[CH3:2][C:1]1[N:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[CH:5]=[C:6]([C:16]#[N:17])[C:7](=[O:15])[NH:8]2

Komponenten

4

Edukt 2

HCID 160693Formamidine acetateHCID 53841137HCID 53841137, Verbindung

Produkt 1

HCID 57130685-methyl-2-oxo-1H-1,6-naphthyridine-3-carbonitrileAusbeute 103,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

E-1. 1,2-Dihydro-5-methvl-2-oxo-1,6-naphthyridine-3-carbonitrile--A mixture containing 33.2 g of 5-acetyl-1,2-dihydro-6-(2-dimethylaminoethenyl)-2-oxo-3-pyridincarbonitrile, 32.1 g of formamidine acetate and 300 ml of dimethylformamide was heated in a oil bath at 120°-130° C. for 3 hours, the original yellow solid dissolving and dark solution resulting. The reaction mixture was evaporated to dryness and then treated with 400 ml of water followed by 30 ml of acetic acid. The resulting insoluble solid was collected, washed with water, air-dried, recrystallized from dimethylformamide and dried at 90° C. to yield 27.4 g of 1,2-dihydro-5-methyl-2-oxo-1,6-naphthyridine-3-carbonitrile as a compound containing 1/2 mole of dimethylformamide, m.p. 278°-280° C. with decomposition.

Aufarbeitung

  1. temperaturewas heated in a oil bath at 120°-130° C. for 3 hours
  2. dissolutionthe original yellow solid dissolving
  3. customdark solution resulting
  4. customThe reaction mixture was evaporated to dryness
  5. additiontreated with 400 ml of water
  6. customThe resulting insoluble solid was collected
  7. washwashed with water
  8. customair-dried
  9. customrecrystallized from dimethylformamide
  10. customdried at 90° C.

Quellen und Nachweise

ORD-Eintrag
ord-1a1c203ab9f4465a9e7a734f7bd59abf
Quelldatensatz
uspto-grants-1985_05
Patentnummer
US04517190

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