反応式
[I:1][C:2]1[N:3]=[C:4]([CH:15]2[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]2)[N:5]([CH2:8][CH2:9][N:10]2[CH2:14][CH2:13][CH2:12][CH2:11]2)[C:6]=1I.CC1CCCO1.C([Mg]Cl)(C)C.O1CCCC1>O.C(O)(=O)C>[I:1][C:2]1[N:3]=[C:4]([CH:15]2[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]2)[N:5]([CH2:8][CH2:9][N:10]2[CH2:14][CH2:13][CH2:12][CH2:11]2)[CH:6]=1参加物
反応物 4
生成物 1
試薬・触媒・溶媒 2
実験手順
Combine tert-butyl 4-[4,5-diiodo-1-(2-pyrrolidin-1-ylethyl)imidazol-2-yl]piperidine-1-carboxylate (39 g, 64.97 mmol) and 2-methyltetrahydrofuran (273 mL), then cool to −15° C. Add 2 M isopropylmagnesium chloride in tetrahydrofuran (32.48 mL, 1.0 eq) dropwise over 45 minutes, maintaining the temperature below −10° C. Stir for an additional 30 min. Add acetic acid (7.45 mL) dropwise, then water (120 mL). Wash the aqueous phase with methyl tert-butyl ether (2×50 mL). Wash the organics with aqueous saturated sodium chloride. Dry the organics over anhydrous magnesium sulfate and concentrate in vacuo. Crystallize the resulting oil from hexanes/methyl tert-butyl ether to give tert-butyl 4-[4-iodo-1-(2-pyrrolidin-1-ylethyl)imidazol-2-yl]piperidine-1-carboxylate as a white solid (29 g, 94%). MS (ES) m/z=475 [M]+.
後処理
- temperaturemaintaining the temperature below −10° C
- washWash the aqueous phase with methyl tert-butyl ether (2×50 mL)
- washWash the organics with aqueous saturated sodium chloride
- dry with materialDry the organics over anhydrous magnesium sulfate
- concentrationconcentrate in vacuo
- customCrystallize the resulting oil from hexanes/methyl tert-butyl ether
出典と根拠
- ORDレコード
- ord-02ec8b593e744bcf8a78e573d26ca337
- 出典データセット
- uspto-grants-2013_05
- 特許番号
- US08436002B2
関連ノート
読み込み中…