反应详情

3-Hydroxybenzoic acid (13.8 g) was dissolved in a solution of sodium hydroxide (8 g) in water (50 ml) and stirred at 0°-5° with cooling while ethyl chloroformate was added dropwise. When addition was complete the solution was warmed to room temperature and stirred for 2 hours. The solution was acidified with 2 molar sulphuric acid. The white solid which separated was washed with water. The solid was taken up in chloroform and the solution dried (MgSO4) and evaporated to give 3-ethoxycarbonyloxybenzoic acid (14 g) with a melting point of 70°-72°.

1. additionwas added dropwise
2. additionWhen addition
3. stirringstirred for 2 hours
4. customThe white solid which separated
5. washwas washed with water
6. dry with materialthe solution dried (MgSO4)
7. customevaporated