Methyl iodide → 2-(Tert-butoxycarbonyl)-1-methyl-1,2,3,4-tetrahydroisoquinoline-8-carboxylic acid
反応式
[C:1]([O:5][C:6]([N:8]1[CH2:17][CH2:16][C:15]2[C:10](=[C:11]([C:18]([OH:20])=[O:19])[CH:12]=[CH:13][CH:14]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH3:21]N(C)CCN(C)C.C([Li])(C)(C)C.IC>O1CCCC1>[C:1]([O:5][C:6]([N:8]1[CH2:17][CH2:16][C:15]2[C:10](=[C:11]([C:18]([OH:20])=[O:19])[CH:12]=[CH:13][CH:14]=2)[CH:9]1[CH3:21])=[O:7])([CH3:4])([CH3:2])[CH3:3]参加物
反応物 4
生成物 1
試薬・触媒・溶媒 1
反応条件
- 温度
- -78 °C
実験手順
To a solution of 2-(tert-butoxycarbonyl)-1,2,3,4-tetrahydroisoquinoline-8-carboxylic acid (2.25 g) and tetramethylethylenediamine (1.347 mL) in tetrahydrofuran (40 mL) was added dropwise t-butyllithium (1.6M, 15.21 mL) at −78° C. The mixture was stirred at −78° C. for 40 minutes. To the resulting mixture was added iodomethane (5.07 mL) dropwise and the mixture was stirred at −78° C. for 3 hours, followed by stirring at room temperature overnight. The reaction mixture was quenched with saturated ammonium chloride. The reaction mixture was extracted with ethyl acetate (150 mL), washed with brine (40 mL×3), dried over Na2SO4, filtered, and concentrated. The crude product was purified by flash chromatography (silica gel, 10% methanol/dichloromethane).
後処理
- stirringthe mixture was stirred at −78° C. for 3 hours
- stirringby stirring at room temperature overnight
- customThe reaction mixture was quenched with saturated ammonium chloride
- extractionThe reaction mixture was extracted with ethyl acetate (150 mL)
- washwashed with brine (40 mL×3)
- dry with materialdried over Na2SO4
- filtrationfiltered
- concentrationconcentrated
- customThe crude product was purified by flash chromatography (silica gel, 10% methanol/dichloromethane)
出典と根拠
- ORDレコード
- ord-80e87702bcc84ea59e1518b14075a9bb
- 出典データセット
- uspto-grants-2014_11
- 特許番号
- US08889675B2
反応ノート
読み込み中…