Methyl iodide → 7-amino-4-methyl-2H-1,4-benzoxazine

HRID 970652Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 970652
[C:1](=O)([O-])[O-].[K+].[K+].CI.[N+:9]([C:12]1[CH:13]=[CH:14][C:15]2[NH:20][CH2:19][CH2:18][O:17][C:16]=2[CH:21]=1)([O-])=O.[H-].[Na+]>CN(C=O)C>[CH3:1][N:20]1[CH2:19][CH2:18][O:17][C:16]2[CH:21]=[C:12]([NH2:9])[CH:13]=[CH:14][C:15]1=2

Komponenten

6

Edukt 4

HCID 6328Methyl iodide2×HCID 11430Potassium CarbonateHCID 24758Sodium hydrideHCID 184161517-Nitro-3,4-dihydro-2H-1,4-benzoxazine

Produkt 1

HCID 112174297-amino-4-methyl-2H-1,4-benzoxazineAusbeute 95,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Potassium carbonate (800 mg, 6 mmol) and methyl iodide (1.3 g, 9 mmol) were added to a solution of 3,4-dihydro-7-nitro-2H-benzo[b][1,4]oxazine (540 mg, 3 mmol) in DMF (10 mL). The reaction mixture was stirred at room temperature overnight. Sodium hydride (100 mg, 95%) and methyl iodide (1.0 g) were added and the reaction mixture was stirred at room temperature overnight. The solvent was removed under vacuum and the residue was suspended in water. A solid precipitated which was filtered and washed with water. The bright yellow solid was then suspended in MeOH (20 mL) and Pd/C (10%) was added. The suspension was stirred under an atmosphere of hydrogen overnight, then filtered through celite and the filtrate concentrated under vacuum to give the product (470 mg) as a purple oil.

Aufarbeitung

  1. stirringthe reaction mixture was stirred at room temperature overnight
  2. customThe solvent was removed under vacuum
  3. customA solid precipitated which
  4. filtrationwas filtered
  5. washwashed with water
  6. additionPd/C (10%) was added
  7. stirringThe suspension was stirred under an atmosphere of hydrogen overnight
  8. filtrationfiltered through celite
  9. concentrationthe filtrate concentrated under vacuum

Quellen und Nachweise

ORD-Eintrag
ord-f1839c26ae8f4e118a78db9a98a785ef
Quelldatensatz
uspto-grants-2007_12
Patentnummer
US07312233B2

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