Peracetic Acid → 2-(4-Ethoxycarbonylphenyl)pyridine N-oxide

HRID 568528ノート

反応式

HRID 568528 の反応式
C(OO)(=[O:3])C.[CH2:6]([O:8][C:9]([C:11]1[CH:16]=[CH:15][C:14]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=2)=[CH:13][CH:12]=1)=[O:10])[CH3:7]>>[CH2:6]([O:8][C:9]([C:11]1[CH:16]=[CH:15][C:14]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][N+:18]=2[O-:3])=[CH:13][CH:12]=1)=[O:10])[CH3:7]

参加物

3

反応物 2

HCID 6585Peracetic AcidHCID 14097203Ethyl 4-(pyridin-2-yl)benzoate

生成物 1

HCID 147974372-(4-Ethoxycarbonylphenyl)pyridine N-oxide

実験手順

8.9 ml of 40% peracetic acid is added dropwise to 14.08 g of 2-(p-ethoxycarbonylphenyl)pyridine so as to maintain the reaction temperature between 80° and 85°. After the addition is complete the reaction mixture is heated at 90° for 3 h, and allowed to cool to room temperature. The excess peracetic acid is destroyed with aqueous sodium sulfite solution. The solvent is evaporated and the residue taken up in methylene chloride and refiltered through Celite®. Evaporation yields 2-(p-ethoxycarbonylphenyl)pyridine-N-oxide which is treated with 8.66 g dimethyl sulfate in 62 ml of toluene at 90° for 3 h. The solvent is evaporated and the residue redissolved in an ice-cold mixture of 8 ml of water and 9.3 ml of 1N sodium hydroxide. A solution of 13.64 g of potassium cyanide in 10 ml of water is added slowly and the reaction mixture is maintained at 0° for 24 h. Extraction with methylene chloride, drying over sodium sulfate and evaporation of solvent yields the title compound (a); IR (CH2Cl2) 2200 cm-1.

後処理

  1. temperatureto maintain the reaction temperature between 80° and 85°
  2. additionAfter the addition
  3. temperatureis heated at 90° for 3 h
  4. customThe excess peracetic acid is destroyed with aqueous sodium sulfite solution
  5. customThe solvent is evaporated
  6. customEvaporation

出典と根拠

ORDレコード
ord-b7b06487de074136892ac2a2a0ca33dc
出典データセット
uspto-grants-1988_03
特許番号
US04728645

反応ノート

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