反応式
C([Li])CCC.Br[C:7]1[C:11]2[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=2[O:9][CH:8]=1.[CH:16]([N:29]1[CH2:32][C:31](=[O:33])[CH2:30]1)([C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.O>C1COCC1>[CH:16]([N:29]1[CH2:32][C:31]([C:8]2[O:9][C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=3[CH:7]=2)([OH:33])[CH2:30]1)([C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1参加物
反応条件
- 温度
- -78 °C
実験手順
A 2.5 M solution of n-butyllithium in hexanes (2.23 mL, 5.58 mmol) was added dropwise to a solution of 3-bromobenzofuran (1.0 g, 5.08 mmol) in THF (35 mL) at −78° C. The reaction mixture was stirred for 30 minutes at −78° C. and then a solution of 1-benzhydrylazetidin-3-one (1.2 g, 5.08 mmol, as prepared in step 1 of example FAB270) in THF (10 mL) was added dropwise at the same temperature. The mixture was allowed to warm back to room temperature overnight. Water (50 mL) was added and the mixture was extracted with ethyl acetate (3×50 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated. The residue was purified by chromatography on silica gel using petroleum ether/dichloromethane (50:50 to 0:100) as eluent. The title compound was obtained as a yellow solid (230 mg, 13%).
後処理
- temperatureto warm back to room temperature overnight
- extractionthe mixture was extracted with ethyl acetate (3×50 mL)
- dry with materialThe combined organic layers were dried over sodium sulfate
- filtrationfiltered
- concentrationconcentrated
- customThe residue was purified by chromatography on silica gel
出典と根拠
- ORDレコード
- ord-5696a1088c814c75983613d772ed75fd
- 出典データセット
- uspto-grants-2014_09
- 特許番号
- US08846711B2
関連ノート
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