Hydrochloric Acid → (E)-3-(5-ethyl-4-hydroxy-3-methoxy-1-naphthyl)-2-methylpropenoic acid

HRID 488128ノート

反応式

HRID 488128 の反応式
[CH2:1]([C:3]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[C:5]([O:23]COC)=[C:6]([O:21][CH3:22])[CH:7]=[C:8]2/[CH:13]=[C:14](\[CH3:20])/[C:15]([O:17]CC)=[O:16])[CH3:2].[OH-].[K+].Cl>C(O)C>[CH2:1]([C:3]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[C:5]([OH:23])=[C:6]([O:21][CH3:22])[CH:7]=[C:8]2/[CH:13]=[C:14](\[CH3:20])/[C:15]([OH:17])=[O:16])[CH3:2]

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 14797Potassium HydroxideHCID 9975669ethyl (E)-3-(5-ethyl-3-methoxy-4-methoxymethoxy-1-naphthyl)-2-methylpropenoate

生成物 1

HCID 6509859(E)-3-(5-ethyl-4-hydroxy-3-methoxy-1-naphthyl)-2-methylpropenoic acid収率 102.8%

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

実験手順

28 g of ethyl (E)-3-(5-ethyl-3-methoxy-4-methoxymethoxy-1-naphthyl)-2-methylpropenoate was dissolved in 240 ml of ethanol and a potassium hydroxide aqueous solution (potassium hydroxide 28 g/water 55 ml) was added, followed by refluxing for 1 hour. 280 ml of 2N hydrochloric acid was added to the reaction mixture at ice bath temperature to make it acidic, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and evaporated. Diisopropyl ether was added to the resultant residue and the resultant crystals were filtered to obtain 23 g of the titled compound as pale yellow crystals.

後処理

  1. temperatureby refluxing for 1 hour
  2. extractionfollowed by extraction with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customevaporated
  6. additionDiisopropyl ether was added to the resultant residue
  7. filtrationthe resultant crystals were filtered

出典と根拠

ORDレコード
ord-3fc249752cb64d8eacf6d3ff841003f7
出典データセット
uspto-grants-1994_03
特許番号
US05298649

反応ノート

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