Hydrogen Bromide → 3-(4-Bromo-phenyl)-benzo[b]thiophen-6-ol
反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]3[CH:16]=[CH:15][C:14]([O:17]C)=[CH:13][C:10]=3[S:11][CH:12]=2)=[CH:4][CH:3]=1.Br>C(O)(=O)C>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]3[CH:16]=[CH:15][C:14]([OH:17])=[CH:13][C:10]=3[S:11][CH:12]=2)=[CH:4][CH:3]=1参加物
4
実験手順
7.4 g (23.17 mmol) 3-(4-Bromo-phenyl)-6-methoxy-benzo[b]thiophene in 47 ml acetic acid were treated with 27 ml (62% aq) HBr at 125° C. for 4 h. The solution was concentrated in vacuo and the residue was dissolved in NaHCO3 and EtOAc. Prior to extraction with EtOAc the pH was adjusted with 2M NaOH (pH 8). The combined organic phases were washed with brine and dried with Na2SO4. Trituration with hexane gave 6.96 g (98%) 3-(4-Bromo-phenyl)-benzo[b]thiophen-6-ol as light green solid, MS: 304 (M, 1Br).
後処理
- concentrationThe solution was concentrated in vacuo
- dissolutionthe residue was dissolved in NaHCO3
- extractionPrior to extraction with EtOAc the pH
- washThe combined organic phases were washed with brine
- dry with materialdried with Na2SO4
出典と根拠
- ORDレコード
- ord-5047a2ceeb384b0aab01f5bbc791bf5c
- 出典データセット
- uspto-grants-2007_02
- 特許番号
- US07173043B2
反応ノート
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