反应详情

23.6 g of ID-1 were refluxed together with 20.2 g of sulphobenzoic anhydride and 9 ml of pyridine in 200 ml of toluene. The oil formed was taken up in 300 ml of NaOH 1N and again heated to reflux with 200 ml of toluene. After elimination of the solvents by evaporation the precipitate formed was taken up in 500 ml of methanol. The precipitate, a lightly yellow powder, dissolved but recrystallized immediately. The yield was 54%.

1. customThe oil formed
2. temperatureagain heated
3. customAfter elimination of the solvents by evaporation the precipitate
4. customformed
5. dissolutionThe precipitate, a lightly yellow powder, dissolved
6. customrecrystallized immediately