Reaktionsgleichung
[OH:1][N:2]=[C:3](Cl)[C:4]1[C:8]([NH:9][CH2:10][CH2:11][O:12][CH3:13])=[N:7][O:6][N:5]=1.[Br:15][C:16]1[CH:17]=[C:18]([CH:20]=[CH:21][C:22]=1[F:23])[NH2:19].C(=O)(O)[O-].[Na+]>O>[Br:15][C:16]1[CH:17]=[C:18]([NH:19][C:3]([C:4]2[C:8]([NH:9][CH2:10][CH2:11][O:12][CH3:13])=[N:7][O:6][N:5]=2)=[N:2][OH:1])[CH:20]=[CH:21][C:22]=1[F:23]Komponenten
5
Reaktionsbedingungen
- Temperatur
- 60 °C
Versuchsvorschrift
N-Hydroxy-4-[(2-methoxyethyl)amino]-1,2,5-oxadiazole-3-carboximidoyl chloride (46.0 g, 0.208 mol) was mixed with water (300 mL). The mixture was heated to 60° C. 3-Bromo-4-fluoroaniline [Oakwood products, product #013091] (43.6 g, 0.229 mol) was added and stirred for 10 min. A warm sodium bicarbonate (26.3 g, 0.313 mol) solution (300 mL water) was added over 15 min. The reaction was stirred at 60° C. for 20 min. LCMS indicated reaction completion. The reaction solution was cooled to room temperature and extracted with ethyl acetate (2×300 mL). The combined ethyl acetate solution was dried over sodium sulfate and concentrated to give the desired product (76.7 g, 98%) as a crude brown solid.
Aufarbeitung
- stirringThe reaction was stirred at 60° C. for 20 min
- customreaction completion
- temperatureThe reaction solution was cooled to room temperature
- extractionextracted with ethyl acetate (2×300 mL)
- dry with materialThe combined ethyl acetate solution was dried over sodium sulfate
- concentrationconcentrated
Quellen und Nachweise
- ORD-Eintrag
- ord-8977d57a4e8342d2b25501863e7f168a
- Quelldatensatz
- uspto-grants-2014_09
- Patentnummer
- US08822511B2
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