Water → 1-(8-Bromooctyl)-2,4,5-triphenylimidazole

HRID 265361

反応式

HRID 265361 の反応式
[C:1]1([C:7]2[NH:8][C:9]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[C:10]([C:12]3[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=3)[N:11]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[H-].[Na+].[Br:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH2:34]Br.O>CN(C)C=O>[Br:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][N:11]1[C:10]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[C:9]([C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=2)[N:8]=[C:7]1[C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

参加物

6

反応物 4

HCID 962WaterHCID 102322,4,5-TriphenylimidazoleHCID 24758Sodium hydrideHCID 783101,8-Dibromooctane

生成物 1

HCID 229164371-(8-Bromooctyl)-2,4,5-triphenylimidazole収率 50%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒2 回

反応条件

温度
45 °C

実験手順

2,4,5-Triphenylimidazole (5 g) was added to a suspension of sodium hydride (1.0 g) (50% dispersion in oil, washed with hexane) in dry dimethylformamide (80 ml) under nitrogen. The reaction was stirred at 45° C. for 1 h, cooled and added, over 1 h to a solution of 1,8-dibromo-octane (30 g) in dry dimethylformamide (100 ml) under nitrogen. The reaction was stirred at room temperature for 24 h, water was carefully added and the solvent was removed in vacuo. The residue was dissolved in ethyl acetate (500 ml), washed with water (250 ml), 2N aqueous hydrochloric acid (250 ml), saturated sodium chloride solution (250 ml), dried over anhydrous magnesium sulphate and evaporated to dryness in vacuo. Distillation to remove 1,8-dibromooctane and chromatography on silica gel eluted with dichloromethane gave 1-(8-bromooctyl)-2,4,5-triphenylimidazole (4.1 g, 50%) as an oil; NMR d (CDCl3) 0.9-1.7 (12H, m, 6×CH2), 3.3 (2H, t, BrCH2), 3.9 (2H, t, N--CH2), 7.1-7.7(15H, m, 3×Ph) ppm.

後処理

  1. temperaturecooled
  2. stirringThe reaction was stirred at room temperature for 24 h
  3. customthe solvent was removed in vacuo
  4. dissolutionThe residue was dissolved in ethyl acetate (500 ml)
  5. washwashed with water (250 ml), 2N aqueous hydrochloric acid (250 ml), saturated sodium chloride solution (250 ml)
  6. dry with materialdried over anhydrous magnesium sulphate
  7. customevaporated to dryness in vacuo
  8. distillationDistillation
  9. customto remove 1,8-dibromooctane and chromatography on silica gel
  10. washeluted with dichloromethane

出典と根拠

ORDレコード
ord-711ec5d42d0d4235916d1f906fd9f1f0
出典データセット
uspto-grants-1997_07
特許番号
US05648373

関連ノート

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