反应详情

To a solution of 4-(4-(2-(5-(4-bromo-3,5-dimethoxyphenyl)-1,2,4-oxadiazol-3-yl)-2-(1-ethoxyethoxy)-1-methoxyethyl)phenyl)morpholine (0.335 g, 0.57 mmol) in MeOH (15 mL) was added pyridinium para-toluenesulfonate (0.15 g, 0.6 mmol) and the mixture was stirred at room temperature for 16.5 hrs. The reaction was then heated at 40° C. for 6 hrs, cooled to room temp, and concentrated in vacuo. The residue was dissolved in EtOAc and washed with H2O, saturated NaHCO3 and brine then dried over Na2SO4 and concentrated in vacuo. Purification by chromatography (50-60% EtOAc-hexanes) gave 1-(5-(4-bromo-3,5-dimethoxyphenyl)-1,2,4-oxadiazol-3-yl)-2-methoxy-2-(4-morpholinophenyl)ethanol as a colorless residue (0.234, 79% yield).

1. temperatureThe reaction was then heated at 40° C. for 6 hrs
2. temperaturecooled to room temp
3. concentrationconcentrated in vacuo
4. dissolutionThe residue was dissolved in EtOAc
5. washwashed with H2O, saturated NaHCO3 and brine
6. dry with materialthen dried over Na2SO4
7. concentrationconcentrated in vacuo
8. customPurification by chromatography (50-60% EtOAc-hexanes)