反应详情

5-Nitroisophthalic acid (4.22 g, 20 mmol) was suspended in dichloromethane (80 ml) and concentrated sulphuric acid (1 ml) was added. The solution was stirred and then saturated with isobutylene gas. The reaction vessel was stoppered and stirred at room temperature overnight. The solution was filtered and anhydrous potassium carbonate was added to the filtrate the solution was filtered and evsaporated and the residue recrystallised from ethanol to leave the title compound as a white solid (2.2 g).

1. stirringstirred at room temperature overnight
2. filtrationThe solution was filtered
3. additionanhydrous potassium carbonate was added to the filtrate the solution
4. filtrationwas filtered
5. customthe residue recrystallised from ethanol