Potassium Carbonate → 3-(2-Bromo-3-pyridyl)isoxazole
Reaktionsgleichung
[Br:1][C:2]1[C:7]([C:8]2[CH:12]=[C:11]([Si](C)(C)C)[O:10][N:9]=2)=[CH:6][CH:5]=[CH:4][N:3]=1.C(=O)([O-])[O-].[K+].[K+]>CO>[Br:1][C:2]1[C:7]([C:8]2[CH:12]=[CH:11][O:10][N:9]=2)=[CH:6][CH:5]=[CH:4][N:3]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a solution of [3-(2-bromo-3-pyridyl)isoxazol-5-yl]-trimethyl-silane (620 mg, 2.09 mmol) in methanol (18 mL), potassium carbonate (29.12 mg, 208.59 μmoles) is added in one portion. The mixture is stirred at room temperature for 24 h. The solvent is removed in vacuum. The crude is partitioned between ethyl acetate and saturated solution of ammonium chloride. The organics are washed with water and dried over magnesium sulfate, filtered and concentrated under reduced pressure. The crude is purified by normal phase Isco chromatography using as eluent hexane/ethyl acetate from 66/33 to 50/50 as to give 140 mg of title compound as white solid. MS (m/z): 225/227 (M+1/M+3)