Dimethylformamide → HCID 69209009、化合物

HRID 30659

反応式

HRID 30659 の反応式
[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([CH2:10][C:11]([NH2:13])=[O:12])=[CH:6][CH:5]=1)([O-:3])=[O:2].Br[CH2:15][C:16](=O)[CH2:17][CH3:18].CN(C)C=O.C(=O)([O-])[O-].[K+].[K+]>C(OCC)(=O)C.O>[CH2:17]([C:16]1[N:13]=[C:11]([CH2:10][C:7]2[CH:6]=[CH:5][C:4]([N+:1]([O-:3])=[O:2])=[CH:9][CH:8]=2)[O:12][CH:15]=1)[CH3:18]

参加物

7

反応物 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 131561-Bromo-2-butanoneHCID 2336132-(4-Nitrophenyl)acetamide

生成物 1

HCID 69209009HCID 69209009、化合物収率 14.1%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
140 °C

実験手順

A mixture of 2-(4-nitrophenyl)acetamide (14.6 g), 1-bromo-2-butanone (20.46 g) and N,N-dimethylformamide (2 mL) was stirred at 140° C. for 2 hrs. Water, potassium carbonate and ethyl acetate were added to basify the reaction mixture and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to give 4-ethyl-2-(4-nitrobenzyl)-1,3-oxazole as brown crystals (2.65 g, yield 14%) from a fraction eluted with hexane-ethyl acetate (2:1, v/v). Recrystallization thereof from ethyl acetate-hexane gave brown prism crystals. melting point: 58-59° C.

後処理

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated

出典と根拠

ORDレコード
ord-b56ec8bd870e48eab7445f993a260e0a
出典データセット
uspto-grants-2008_09
特許番号
US07423159B2

関連ノート

読み込み中…