Benzonitrile → 1-Methyl-4-phenyl-5-(4-pyridyl)imidazole

HRID 2293509ノート

反応式

HRID 2293509 の反応式
C(NC(C)C)(C)C.C([Li])CCC.[CH3:13][N:14]([CH2:17][C:18]1[CH:23]=[CH:22][N:21]=[CH:20][CH:19]=1)[CH:15]=O.[C:24](#[N:31])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1>C1COCC1>[CH3:13][N:14]1[C:17]([C:18]2[CH:23]=[CH:22][N:21]=[CH:20][CH:19]=2)=[C:24]([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[N:31]=[CH:15]1

参加物

6

反応物 4

HCID 7505BenzonitrileHCID 7912DiisopropylamineHCID 15893405N-Methyl-N-[4-picolyl]formamideHCID 178418339Butyllithium

生成物 1

HCID 187714831-Methyl-4-phenyl-5-(4-pyridyl)imidazole

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

To a solution of di-iso-propyl-amine (11.2 mL, 79.9 mmol) in 150 mL of THF at -78° C. was added n-butyllithium (31.9 mL of 2.5M solution, 79.9 mmol). To the resulting mixture was added a solution of N-methyl-N-[4-picolyl]formamide (10 g, 66.5 mmol) in THF. The resulting orange-brown solution was stirred at -78° C. for 20 min, at which time benzonitrile (13.6 mL, 133 mmol) was added. The resulting dark brown mixture was allowed to warm to rt and stirred for 1 h, heated to reflux for 4 h, and then cooled to rt and partitioned between CH2Cl2 and H2O. The organic extract was washed with aqueous NaCl and dried (MgSO4). The solvent was removed in vacuo, and the residue was purified by flash chromatography, eluting with 50:1 CH2Cl2 /MeOH. The title compound was obtained as a light tan solid (5.83 g, 37%): mp 158°-159° C.

後処理

  1. additionwas added
  2. temperatureheated
  3. temperatureto reflux for 4 h
  4. temperaturecooled to rt
  5. custompartitioned between CH2Cl2 and H2O
  6. extractionThe organic extract
  7. washwas washed with aqueous NaCl
  8. dry with materialdried (MgSO4)
  9. customThe solvent was removed in vacuo
  10. customthe residue was purified by flash chromatography
  11. washeluting with 50:1 CH2Cl2 /MeOH

出典と根拠

ORDレコード
ord-0bfe5391a76c42cf8420be94e4391c46
出典データセット
uspto-grants-1997_11
特許番号
US05686455

反応ノート

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