Methylglyoxal → 2-Methyl-6-fluoroquinoxaline

HRID 334664Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 334664
O=[C:2]([CH3:5])[CH:3]=O.[F:6][C:7]1[CH:8]=[C:9]([NH2:14])[C:10]([NH2:13])=[CH:11][CH:12]=1>O>[F:6][C:7]1[CH:8]=[C:9]2[C:10](=[CH:11][CH:12]=1)[N:13]=[C:2]([CH3:5])[CH:3]=[N:14]2

Komponenten

4

Edukt 2

HCID 880MethylglyoxalHCID 1645844-Fluorobenzene-1,2-diamine

Produkt 1

HCID 133808502-Methyl-6-fluoroquinoxalineAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel2×

Versuchsvorschrift

A solution of 2-oxo-propionaldehyde (0.19 mL, 1.20 mmol) and 4-fluoro-benzene-1,2-diamine (150 mg, 1.19 mmol) in water (1.3 mL) was placed in a microwave tube and heated for 1 min. at 150 W. Then the reaction mixture was diluted with water and extracted twice with AcOEt. The organic phase was washed with water, brine, dried over MgSO4, filtered and evaporated. The crude residue was purified by flash chromatography (cyclohexane/AcOEt 4:1) to yield 154 mg (0.95 mmol, 80%) of 6-fluoro-2-methyl-quinoxaline.

Aufarbeitung

  1. temperatureheated for 1 min. at 150 W
  2. extractionextracted twice with AcOEt
  3. washThe organic phase was washed with water, brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. customevaporated
  7. customThe crude residue was purified by flash chromatography (cyclohexane/AcOEt 4:1)

Quellen und Nachweise

ORD-Eintrag
ord-b29aac2fcb484a8f9f084041d18359b8
Quelldatensatz
uspto-grants-2014_11
Patentnummer
US08883826B2

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