反应详情

To a mixture of 3 g (0.027 mol) of itaconic anhydride in 30 ml of tetrahydrofuran, 3 ml of 28% ammonium hydroxide was added. After 1 hr. the reaction mixture was evaporated to dryness under reduced pressure. The residue was dissolved in 15 ml of water, then acidified to pH 2 with concentrated hydrochloric acid and allowed to stay overnight at 40. The precipitate formed was filtered off, washed with a small portion of cold water and dried to give 1.4 g (40% yield) of the title compound melting at 153-154° C.; NMR (DMSO-d6): 3.11 (s, 2H, CH2); 5.67,6.13 (s, s, 1H, 1H, CH); 6.7, 7.9 (broad s, s 1H, 1H, NH); 12.15 (broad s, 1H, OH).

1. additionwas added
2. customthe reaction mixture was evaporated to dryness under reduced pressure
3. dissolutionThe residue was dissolved in 15 ml of water
4. waitto stay overnight at 40
5. customThe precipitate formed
6. filtrationwas filtered off
7. washwashed with a small portion of cold water
8. customdried