Sodium Methoxide → 2-Amino-3,6,7-trimethoxyquinoxaline

HRID 1907644Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1907644
[NH2:1][C:2]1[C:11](Cl)=[N:10][C:9]2[C:4](=[CH:5][C:6]([O:15][CH3:16])=[C:7]([O:13][CH3:14])[CH:8]=2)[N:3]=1.[CH3:17][O-:18].[Na+]>O1CCCC1.CO>[NH2:1][C:2]1[C:11]([O:18][CH3:17])=[N:10][C:9]2[C:4](=[CH:5][C:6]([O:15][CH3:16])=[C:7]([O:13][CH3:14])[CH:8]=2)[N:3]=1

Komponenten

5

Edukt 2

HCID 10942334Sodium MethoxideHCID 866257813-Chloro-6,7-dimethoxyquinoxalin-2-amine

Produkt 1

HCID 692443442-Amino-3,6,7-trimethoxyquinoxalineAusbeute 85,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To 2-amino-3-chloro-6,7-dimethoxy quinoxaline (3.27 g, 13.6 mmol) dissolved in tetrahydrofuran (40 ml), 25 wt % sodium methoxide (4.41 g, 20.4 mmol) in methanol was added at room temperature and stirred further at room temperature for 2 hour. The resulting mixture was concentrated under the reduced pressure to remove the solvent. The product was extracted with dichloromethane and the organic layer was washed with water and dried over MgSO4. After concentration under the reduced pressure, the crude product was purified by SiO2 column chromatography. Extraction of the residue with a n-hexane:ethyl acetate (2:1) mixture and concentration gave 2.73 g of the titled compound (yield, 85%).

Aufarbeitung

  1. concentrationThe resulting mixture was concentrated under the reduced pressure
  2. customto remove the solvent
  3. extractionThe product was extracted with dichloromethane
  4. washthe organic layer was washed with water
  5. dry with materialdried over MgSO4
  6. concentrationAfter concentration under the reduced pressure
  7. customthe crude product was purified by SiO2 column chromatography
  8. extractionExtraction of the residue
  9. concentrationwith a n-hexane:ethyl acetate (2:1) mixture and concentration

Quellen und Nachweise

ORD-Eintrag
ord-1296511a93a1449e894ccba4ae48b234
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08598173B2

Notizen zur Reaktion

Wird geladen…