Tetrahydrofuran → HCID 21989976, Verbindung
Reaktionsgleichung
[NH2:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([F:8])[C:3]=1[OH:9].[O:10]1CCC[CH2:11]1>>[F:8][C:4]1[C:3]2[O:9][C:11](=[O:10])[NH:1][C:2]=2[CH:7]=[CH:6][CH:5]=1Komponenten
3
Versuchsvorschrift
In a three neck flask, fitted with a magnetic stirrer, under inert atmosphere, 1,1-carbonyldiimidazole (15.6 g, 96 mmol) is added to a solution of 2-amino-6-fluorophenol 1 (4 g, 32 mmol) in 100 ml of anhydrous tetrahydrofuran at room temperature. The solution is refluxed for 1 h, cooled down to room temperature and concentrated in vacuo. The crude reaction mixture is purified by chromatography on silicagel (n-hexane/AcOEt:1/1 (v/v)) to afford 7-fluoro-1,3-benzoxazol-2(3H)-one 2.
Aufarbeitung
- temperatureThe solution is refluxed for 1 h
- concentrationconcentrated in vacuo
- customThe crude reaction mixture
- customis purified by chromatography on silicagel (n-hexane/AcOEt:1/1 (v/v))
Quellen und Nachweise
- ORD-Eintrag
- ord-28a46127a9ea475185c9b8227f5649ed
- Quelldatensatz
- uspto-grants-2012_10
- Patentnummer
- US08293775B2
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