Diethyl 2-(ethoxymethylidene)-3-oxobutanedioate → Diethyl 5-ethylpyridine-2,3-dicarboxylate

HRID 54175

反応式

HRID 54175 の反応式
C(O[CH:4]=[C:5]([C:11]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=O)[C:6]([O:8][CH2:9][CH3:10])=[O:7])C.O1CC[N:21]([CH:24]=[CH:25][CH2:26][CH3:27])CC1>C(Cl)Cl>[CH2:26]([C:25]1[CH:4]=[C:5]([C:6]([O:8][CH2:9][CH3:10])=[O:7])[C:11]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[N:21][CH:24]=1)[CH3:27]

参加物

4

反応物 2

HCID 40590Diethyl 2-(ethoxymethylidene)-3-oxobutanedioateHCID 5809771-Morpholinobutene

生成物 1

HCID 10857926Diethyl 5-ethylpyridine-2,3-dicarboxylate収率 57%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

Diethyl ethoxymethyleneoxalacetate (3.17 g, 0.013 mol) is added to a solution of 1-morpholinobutene (1.84 g, 0.013 mol) dissolved in CH2Cl2 (40 mL) at 0°. The solution is concentrated in vacuo, and ammonium acetate (50 g), ammonium hydroxide (10 mL), tetrahydrofuran (20 mL) and 95% ethanol (20 mL) are added. The solution is heated to reflux for 30 minutes, then held at 3° for 72 hours. The reaction solution is then partitioned between water and ethyl acetate. The organic layer is dried over sodium sulfate and concentrated in vacuo to give the product (1.85 g, 0.0074 mol, 57%).

後処理

  1. concentrationThe solution is concentrated in vacuo, and ammonium acetate (50 g), ammonium hydroxide (10 mL), tetrahydrofuran (20 mL) and 95% ethanol (20 mL)
  2. additionare added
  3. temperatureThe solution is heated
  4. temperatureto reflux for 30 minutes
  5. customThe reaction solution is then partitioned between water and ethyl acetate
  6. dry with materialThe organic layer is dried over sodium sulfate
  7. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-c97b5599ce8c4fe7bd8e9e468c4dd726
出典データセット
uspto-grants-1997_04
特許番号
US05622913

関連ノート

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