反応式
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][N:11]2[CH2:16][CH2:15][CH:14]([C:17]([O:19]C)=O)[CH2:13][CH2:12]2)=[CH:5][CH:4]=1.[Li][C:22]1[S:23][CH:24]=[CH:25][CH:26]=1>O1CCCC1>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH2:9][CH2:10][N:11]2[CH2:12][CH2:13][CH:14]([C:17]([C:22]3[S:23][CH:24]=[CH:25][CH:26]=3)([C:22]3[S:23][CH:24]=[CH:25][CH:26]=3)[OH:19])[CH2:15][CH2:16]2)=[CH:7][CH:8]=1参加物
反応条件
- 温度
- -78 °C
実験手順
Dissolve 1-[2-(4-methoxyphenyl)ethyl]-4-piperidinecarboxylic acid, methyl ester (4.0 g, 14.42 mmol) in anhydrous tetrahydrofuran (100 mL), place under an argon atmosphere and cool to -78° C. Add, by dropwise addition, 2-lithiothiophene (14.42 mL of a 1M solution in tetrahydrofuran, 14.42 mmol) and stir at -78° C. for 3 hours. Add additional 2-lithiothiophene (14.42 mL of a 1M solution in tetrahydrofuran, 14.42 mmol) and stir at -78°C. for 2 hours. Remove the ice bath and allow to warm to room temperature. Quench with saturated ammonium chloride (100 mL), separate the organic phase and extract the aqueous phase with ethyl acetate. Combine the organic phases, dry (MgSO4) and evaporate the solvent in vacuo. Purify by chromatography (ethyl acetate) and recrystallize (ethyl acetate) to give the title compound as fluffy white crystals; mp 153°-155° C.
後処理
- stirringstir at -78°C. for 2 hours
- customRemove the ice bath
- temperatureto warm to room temperature
- customQuench with saturated ammonium chloride (100 mL)
- customseparate the organic phase
- extractionextract the aqueous phase with ethyl acetate
- dry with materialdry (MgSO4)
- customevaporate the solvent in vacuo
- customPurify by chromatography (ethyl acetate)
- customrecrystallize (ethyl acetate)
出典と根拠
- ORDレコード
- ord-155c29c7d0904112a5f2f9f06e309855
- 出典データセット
- uspto-grants-1997_02
- 特許番号
- US05602147
関連ノート
読み込み中…