Water → ethyl 1-benzyl-4-nitro-1H-pyrrole-2-carboxylate

HRID 453577

反応式

HRID 453577 の反応式
[N+:1]([C:4]1[CH:5]=[C:6]([C:9]([O:11][CH2:12][CH3:13])=[O:10])[NH:7][CH:8]=1)([O-:3])=[O:2].[H-].[Na+].[CH2:16](Br)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.O>CN(C)C=O>[CH2:16]([N:7]1[CH:8]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=[C:6]1[C:9]([O:11][CH2:12][CH3:13])=[O:10])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

参加物

6

反応物 4

HCID 962WaterHCID 7498Benzyl BromideHCID 24758Sodium hydrideHCID 242169Ethyl 4-Nitropyrrole-2-carboxylate

生成物 1

HCID 284071ethyl 1-benzyl-4-nitro-1H-pyrrole-2-carboxylate収率 97%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

To a solution of ethyl 4-nitro-1H-pyrrole-2-carboxylate (10 g) in N,N-dimethylformamide (100 mL) was slowly added sodium hydride (60%, oily, 2.4 g) at 0° C., and the mixture was stirred at room temperature for 30 min. Benzylbromide (8.0 mL) was slowly added to the reaction mixture, and the mixture was stirred at room temperature for 2 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4) and concentrated. The obtained residue was subjected to silica gel column chromatography to give ethyl 1-benzyl-4-nitro-1H-pyrrole-2-carboxylate (14.3 g, yield 97%) as yellow crystals from a fraction eluted with ethyl acetate-hexane (1:3, volume ratio). melting point 73° C.

後処理

  1. customat 0° C.
  2. stirringthe mixture was stirred at room temperature for 2 hr
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe ethyl acetate layer was washed with saturated brine
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated

出典と根拠

ORDレコード
ord-8db193479ca94788aeda11e3d5bee62d
出典データセット
uspto-grants-2013_07
特許番号
US08492405B2

関連ノート

読み込み中…