Boron tribromide → 2-(1H-pyrazol-4-yl)phenol
Reaktionsgleichung
C[O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[CH:10]=[N:11][NH:12][CH:13]=1.B(Br)(Br)Br>ClCCl>[NH:11]1[CH:10]=[C:9]([C:4]2[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=2[OH:2])[CH:13]=[N:12]1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a solution of 4-(2-methoxyphenyl)pyrazole (300 mg, 1.72 mmol) in dichloromethane (13 ml) is added a 1M solution of boron tribromide (3.8 ml) in dichloromethane. The mixture is stirred at room temperature over night then concentrated under reduced pressure. The residue is chromatographed (silica gel, dichloromethane/ethanol 9:1) to give 270 mg of 2-(pyrazol-4-yl)phenol (98%).
Aufarbeitung
- concentrationthen concentrated under reduced pressure
- customThe residue is chromatographed (silica gel, dichloromethane/ethanol 9:1)
Quellen und Nachweise
- ORD-Eintrag
- ord-dfe1e48f283d449cb79bdc8f3c9fde14
- Quelldatensatz
- uspto-grants-2004_05
- Patentnummer
- US06730792B2
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