反应详情

温度

70 °C

A mixture of 200 mg of ethyl 2-tert-butoxycarbonylamino-5-pyrimidinecarboxylate, 125 mg of potassium hydroxide and 15 mL of ethanol was heated to 70° C. for 3 h, cooled and concentrated under reduced pressure. The residue was dissolved in 50 mL of ice water, washed with 50 mL of ether, acidified to pH=3 with conc. HCl and extracted with 3×50 mL of chloroform. The combined organic extracts were dried (MgSO4) and concentrated under reduced pressure. Drying under vacuum gave 156 mg of 2-tert-butoxycarbonylamino-5-pyrimidinecarboxylic acid as a white solid.

1. temperaturecooled
2. concentrationconcentrated under reduced pressure
3. dissolutionThe residue was dissolved in 50 mL of ice water
4. washwashed with 50 mL of ether
5. extractionextracted with 3×50 mL of chloroform
6. dry with materialThe combined organic extracts were dried (MgSO4)
7. concentrationconcentrated under reduced pressure
8. customDrying under vacuum