Lithium Hydroxide → 4-(Quinoline-8-sulfonamido)benzoic acid

HRID 1626328

反応式

HRID 1626328 の反応式
[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][C:9]=2[S:11]([NH:14][C:15]2[CH:25]=[CH:24][C:18]([C:19]([O:21]CC)=[O:20])=[CH:17][CH:16]=2)(=[O:13])=[O:12])[CH:4]=[CH:3][CH:2]=1.[Li+].[OH-]>C1COCC1.O>[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][C:9]=2[S:11]([NH:14][C:15]2[CH:25]=[CH:24][C:18]([C:19]([OH:21])=[O:20])=[CH:17][CH:16]=2)(=[O:13])=[O:12])[CH:4]=[CH:3][CH:2]=1

参加物

5

反応物 2

HCID 3939Lithium HydroxideHCID 1357549Ethyl 4-(quinoline-8-sulfonamido)benzoate

生成物 1

HCID 7766454-(Quinoline-8-sulfonamido)benzoic acid収率 95.8%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒

反応条件

温度
80 °C

実験手順

To a solution of sulfonamide 90 (34 gm, 95.5 mmol) in THF and water (1:1), LiOH (20 gm, 47.66 mmol) was added and the resulting mixture was allowed to stir at 80° C. overnight. After completion of reaction, the crude mixture was washed with EtOAc. The aqueous layer was acidified with citric acid and filtered. Thus obtained solid was washed with Et2O and azeotroped by toluene, under reduced pressure to afford acid 91 (30 gm, 95.8% yield) which was taken forward for the next step without further purification.

後処理

  1. customAfter completion of reaction
  2. washthe crude mixture was washed with EtOAc
  3. filtrationfiltered
  4. washThus obtained solid was washed with Et2O
  5. customazeotroped by toluene, under reduced pressure

出典と根拠

ORDレコード
ord-e20a7dfbba42489db805e9108a695cc2
出典データセット
uspto-grants-2014_07
特許番号
US08785450B2

関連ノート

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