Triacetoxyperiodinane → [3-(1,1-Dimethyl-2-oxo-ethyl)-isoxazol-5-yl]-carbamic acid tert-butyl ester
Reaktionsgleichung
CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O.[C:23]([O:27][C:28](=[O:40])[NH:29][C:30]1[O:34][N:33]=[C:32]([C:35]([CH3:39])([CH3:38])[CH2:36][OH:37])[CH:31]=1)([CH3:26])([CH3:25])[CH3:24]>C(Cl)Cl>[C:23]([O:27][C:28](=[O:40])[NH:29][C:30]1[O:34][N:33]=[C:32]([C:35]([CH3:39])([CH3:38])[CH:36]=[O:37])[CH:31]=1)([CH3:26])([CH3:24])[CH3:25]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
Dess-Martin periodinane (1.39 g, 3.29 mmol) is added to a solution of [3-(2-hydroxy-1,1-dimethyl-ethyl)-isoxazol-5-yl]-carbamic acid tert-butyl ester (602.0 mg, 2.35 mmol) in DCM (20 mL). The reaction mixture is stirred at room temperature for 1 h. After this time, the reaction mixture is quenched with 50 mL (1:1) of saturated aqueous NaHCO3 solution and saturated aqueous sodium thiosulfate solution and stirred at room temperature for 2 h then extracted with DCM twice. The organic extracts are combined and washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure to provide 587.0 mg of the title compound. Yield: 98.3% 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.45 (6H, s), 1.55 (9H, s), 6.05 (1H, s), 7.25 (1H, s), 9.65 (1H, s).