反応式
[F:1][C:2]1[CH:8]=[CH:7][C:5]([NH2:6])=[C:4]([C:9]([F:12])([F:11])[F:10])[CH:3]=1.[CH3:13][O:14][C:15](=[O:21])[CH2:16][S:17](Cl)(=[O:19])=[O:18]>N1C=CC=CC=1.ClCCl>[CH3:13][O:14][C:15](=[O:21])[CH2:16][S:17](=[O:19])(=[O:18])[NH:6][C:5]1[CH:7]=[CH:8][C:2]([F:1])=[CH:3][C:4]=1[C:9]([F:10])([F:11])[F:12]参加物
反応条件
- 温度
- 0 °C
実験手順
5 g (27.64 mmol) of 4-fluoro-2-(trifluoromethyl)aniline is dissolved in 25 ml of dry pyridine, and the solution is cooled to 0° C. While maintaining the temperature, a solution of 4.82 g (27.4 mmol) of chlorosulfonylacetic acid methyl ester in 20 ml of dichloromethane is added dropwise to the cooled solution during the course of about 10 minutes. Then the mixture is stirred for 6 hours at room temperature. The reaction solution is then diluted with 100 ml of dichloromethane, the pyridine is extracted by shaking with 2N hydrochloride acid, the organic phase is dried over magnesium sulfate, filtered, and evaporated to dryness. The residue is crystallized from diethyl ether/hexane 1:1, thus obtaining 7.35 g (23.32 mmol)=84.35% of theory of a crystallized product, mp 84°14 86° C.
後処理
- temperatureWhile maintaining the temperature
- extractionthe pyridine is extracted
- stirringby shaking with 2N hydrochloride acid
- dry with materialthe organic phase is dried over magnesium sulfate
- filtrationfiltered
- customevaporated to dryness
- customThe residue is crystallized from diethyl ether/hexane 1:1
- customthus obtaining 7.35 g (23.32 mmol)=84.35% of theory of a crystallized product, mp 84°14 86° C.
出典と根拠
- ORDレコード
- ord-d5e7fd8351d6408ca0d43e60050e7952
- 出典データセット
- uspto-grants-1993_05
- 特許番号
- US05210290
関連ノート
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