p-Toluenesulfonic acid monohydrate → 5-Bromo-1-benzothiophene
反応式
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[S:9][CH2:8][CH:7](O)[C:6]=2[CH:11]=1.O.C1(C)C=CC(S(O)(=O)=O)=CC=1>CC(C)=O>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[S:9][CH:8]=[CH:7][C:6]=2[CH:11]=1参加物
4
実験手順
To acetone (600 mL) solution of 300 g of 5-bromo-2,3-dihydro-1-benzothiophen-3-ol was added 12.4 g of p-toluenesulfonic acid monohydrate, which was then refluxed for 2 hours. To the reaction solution was added 15.0 g of activated carbon, which was then stirred. Insoluble matter was filtered off and washed with 300 mL of acetone. The filtrate and washings were combined, to which was dropwise added 2700 mL of water at 5 to 15° C. The precipitate was collected by filtration to provide 268 g of 5-bromo-1-benzothiophene as pale purple solid form.
後処理
- temperaturewas then refluxed for 2 hours
- additionTo the reaction solution was added 15.0 g of activated carbon, which
- filtrationInsoluble matter was filtered off
- washwashed with 300 mL of acetone
- customat 5 to 15° C
- filtrationThe precipitate was collected by filtration
出典と根拠
- ORDレコード
- ord-a64c1fb1562e4e2184a5ef6478f9c063
- 出典データセット
- uspto-grants-2012_09
- 特許番号
- US08273902B2
反応ノート
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