Benzoyl Peroxide → (E)-4-bromo-3-(2-propyl-phenoxy)-but-2-enoic acid ethyl ester

HRID 19221

反応式

HRID 19221 の反応式
[CH2:1]([O:3][C:4](=[O:18])/[CH:5]=[C:6](/[O:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[CH2:15][CH2:16][CH3:17])\[CH3:7])[CH3:2].[Br:19]N1C(=O)CCC1=O.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl>[CH2:1]([O:3][C:4](=[O:18])/[CH:5]=[C:6](/[O:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[CH2:15][CH2:16][CH3:17])\[CH2:7][Br:19])[CH3:2]

参加物

5

反応物 3

HCID 7187Benzoyl PeroxideHCID 67184N-bromobutanimideHCID 66895388(E)-3-(2-propyl-phenoxy)-but-2-enoic acid ethyl ester

生成物 1

HCID 66894945(E)-4-bromo-3-(2-propyl-phenoxy)-but-2-enoic acid ethyl ester収率 49.7%

試薬・触媒・溶媒 1

HCID 5943Carbon Tetrachloride溶媒

実験手順

To a stirred mixture of (E)-3-(2-propyl-phenoxy)-but-2-enoic acid ethyl ester (3.10 g, 0.012 mol) in carbon tetrachloride (20 mL) under a nitrogen atmosphere was added N-bromosuccinimide (3.30 g, 0.019 mol) and benzoyl peroxide (300 mg, 0.001 mol). Nitrogen gas was bubbled through the mixture for 5 min, and the resulting mixture was heated to reflux for 4 h. The reaction mixture was then placed in the refrigerator overnight. The solids formed were removed by filtration and the filtrate concentrated in vacuo. The crude product obtained was purified using flash column chromatography (silica gel (100-200 mesh), ethyl acetate/hexanes) to afford (E)-4-bromo-3-(2-propyl-phenoxy)-but-2-enoic acid ethyl ester (1.95 g, 48%) as a yellow oil.

後処理

  1. customNitrogen gas was bubbled through the mixture for 5 min
  2. temperaturethe resulting mixture was heated
  3. temperatureto reflux for 4 h
  4. customwas then placed in the refrigerator overnight
  5. customThe solids formed
  6. customwere removed by filtration
  7. concentrationthe filtrate concentrated in vacuo
  8. customThe crude product obtained
  9. customwas purified

出典と根拠

ORDレコード
ord-f6b1e0cceea243638295320e584a8d61
出典データセット
uspto-grants-2010_06
特許番号
US07741327B2

関連ノート

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