p-Toluenesulfonic acid → 4-Nitro-2-(3-fluoro-5-hydroxy-2,6-dioxopiperid-3-yl)isoindoline-1,3-dione
反応式
[N+:1]([C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[C:6](=[O:27])[N:7]([C:14]1([F:26])[CH2:19][CH:18]([O:20]C(=O)C)[C:17](=[O:24])[NH:16][C:15]1=[O:25])[C:8]2=[O:13])([O-:3])=[O:2].C1(C)C=CC(S(O)(=O)=O)=CC=1>CO>[N+:1]([C:4]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:5]=1[C:6](=[O:27])[N:7]([C:14]1([F:26])[CH2:19][CH:18]([OH:20])[C:17](=[O:24])[NH:16][C:15]1=[O:25])[C:8]2=[O:13])([O-:3])=[O:2]参加物
4
実験手順
A solution of 3-(4-nitro-1,3-dioxoisoindolin-2-yl)-3-fluoro-2,6-dioxo-5-acetoxypiperidine (1 g, 2.9 mmol) and p-toluenesulfonic acid (0.28 g, 1.5 mmol) in methanol (10 mL) is heated at reflux for 5 h. The solvent is removed in vacuo to give 4-nitro-2-(3-fluoro-5-hydroxy-2,6-dioxopiperid-3-yl)isoindoline-1,3-dione which is further purified by column chromatography.