反应详情

14.3 mg of pyridinium p-toluenesulphonate (0.057 mmol) were added to a solution of the acetal from Example 63A (97.2 mg, 0.191 mmol) in 5.5 ml of acetone/water (10:1), and the mixture was stirred under reflux overnight. Another 14.3 mg of pyridinium p-toluenesulphonate (0.057 mmol) were added, and the mixture was stirred under reflux for another night. The mixture was then cooled, and the precipitate formed was filtered off. Yield: 66.2 mg (74% of theory)

1. temperatureunder reflux overnight
2. stirringthe mixture was stirred
3. temperatureunder reflux for another night
4. temperatureThe mixture was then cooled
5. customthe precipitate formed
6. filtrationwas filtered off