Ammonia → HCID 90202338, Verbindung
Reaktionsgleichung
C([O:3][C:4]([C:6]1[O:10][N:9]=[C:8]([C:11]2[CH:16]=[CH:15][C:14]([O:17][Si:18]([C:21]([CH3:24])([CH3:23])[CH3:22])([CH3:20])[CH3:19])=[CH:13][CH:12]=2)[CH:7]=1)=O)C.[NH3:25]>CCO>[C:21]([Si:18]([CH3:20])([CH3:19])[O:17][C:14]1[CH:15]=[CH:16][C:11]([C:8]2[CH:7]=[C:6]([C:4]([NH2:25])=[O:3])[O:10][N:9]=2)=[CH:12][CH:13]=1)([CH3:24])([CH3:23])[CH3:22]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
3-[4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-isoxazole-5-carboxylic acid ethyl ester (which may be prepared as described in Preparation of Intermediate 12; 500 mg, 1.4 mmol) was dissolved in a saturated solution of NH3 in EtOH (200 mL). The mixture was stirred at room temperature for 60 h. The solvent was evaporated and the residue was purified by chromatography (50-60% EtOAc/hexanes) to give 3-[4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-isoxazole-5-carboxylic acid amide (160 mg, 35%) as a white solid.