Diethyl Ether → Benzeneacetic acid, 4-ethoxy-alpha-methylene-, ethyl ester

HRID 27048

反応式

HRID 27048 の反応式
C([C:3]1[C:4](CC)=[C:5]([CH:12]([C:16](C(O)=O)=O)[C:13]([O-:15])=[O:14])[CH:6]=[CH:7][C:8]=1[O:9][CH2:10][CH3:11])C.C(=O)([O-])[O-].[K+].[K+].[CH3:29][CH2:30]OCC>C=O>[CH2:29]([O:15][C:13](=[O:14])[C:12]([C:5]1[CH:4]=[CH:3][C:8]([O:9][CH2:10][CH3:11])=[CH:7][CH:6]=1)=[CH2:16])[CH3:30]

参加物

5

反応物 3

HCID 3283Diethyl EtherHCID 11430Potassium CarbonateHCID 131711858Diethyl-2-p-ethoxyphenyl-oxaloacetate

生成物 1

HCID 6454764Benzeneacetic acid, 4-ethoxy-alpha-methylene-, ethyl ester

試薬・触媒・溶媒 1

HCID 712Formaldehyde溶媒

実験手順

The keto-ester III (143.8 g) was stirred in dilute formaldehyde solution (62 ml 37% formaldehyde+water 220 ml) and to the suspension potassium carbonate solution (54.5 g, in water 280 ml) was added dropwise. At the end of the addition, ether was added to the stirred suspension to dissolve the gummy precipitate which formed and after an additional 15 minutes, gas evolution commenced. When this gas evolution ceased (after about 2 hours) the reaction mixture was extracted with additional ether and the combined ether extracts were washed with water and evaporated after drying with Na2SO4. The yield of the ethyl-2-(p-ethoxyphenyl)acrylate (II) (isolated as a yellow oil) was 97.8 g (79.8%).

後処理

  1. additionwas added dropwise
  2. additionwas added to the stirred suspension
  3. dissolutionto dissolve the gummy precipitate which
  4. customformed and after an additional 15 minutes
  5. custom(after about 2 hours)
  6. extractionwas extracted with additional ether
  7. washthe combined ether extracts were washed with water
  8. customevaporated
  9. dry with materialafter drying with Na2SO4

出典と根拠

ORDレコード
ord-d793c88c8d7b496f95f1650ed93717a2
出典データセット
uspto-grants-1980_09
特許番号
US04220591

関連ノート

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