Sulfuric Acid → 6-bromo-2,3-dihydro-1H-indol-2-one
反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9](O)=[O:10])=[C:4]([N+:12]([O-])=O)[CH:3]=1.S(=O)(=O)(O)O>C(O)C.[Zn]>[Br:1][C:2]1[CH:3]=[C:4]2[C:5]([CH2:8][C:9](=[O:10])[NH:12]2)=[CH:6][CH:7]=1参加物
5
実験手順
4-Bromo-2-nitrophenylacetic acid (0.26 g), 0.26 g zinc powder and 3 mL 50% sulfuric acid in 5 mL of ethanol were heated at 100° C. overnight. The reaction mixture was filtered, diluted with a little acetic acid, concentrated to remove ethanol, diluted with water and extracted twice with ethyl acetate. The combined extracts were washed with brine, dried over anhydrous sodium sulfate and concentrated to give 0.19 g (90% yield) of 6-bromo-2-oxindole as a yellow solid.
後処理
- filtrationThe reaction mixture was filtered
- additiondiluted with a little acetic acid
- concentrationconcentrated
- customto remove ethanol
- additiondiluted with water
- extractionextracted twice with ethyl acetate
- washThe combined extracts were washed with brine
- dry with materialdried over anhydrous sodium sulfate
- concentrationconcentrated
出典と根拠
- ORDレコード
- ord-6eb115e3539c4995a32bf95b4013b39e
- 出典データセット
- uspto-grants-2000_10
- 特許番号
- US06130238
反応ノート
読み込み中…