反应详情

A mixture of 845 mg of the product of Example 2 and 15 ml of a mixture in equal proportions of sulfuric acid, acetic acid and water was refluxed for 2 hours and the mixture was cooled down, taken up in water, filtered, washed with water and dried at 80° C. under reduced pressure.

1. temperaturewas refluxed for 2 hours
2. temperaturethe mixture was cooled down
3. filtrationfiltered
4. washwashed with water
5. customdried at 80° C. under reduced pressure