Ethanol → HCID 54082689、化合物

HRID 461823

反応式

HRID 461823 の反応式
S(=O)(=O)(O)O.[Cl:6][C:7]1[C:8]([CH3:22])=[CH:9][C:10]2[O:15][C:14]([C:16]([OH:18])=[O:17])=[CH:13][C:12](=[O:19])[C:11]=2[C:20]=1[CH3:21].[CH2:23](O)[CH3:24]>>[Cl:6][C:7]1[C:8]([CH3:22])=[CH:9][C:10]2[O:15][C:14]([C:16]([O:18][CH2:23][CH3:24])=[O:17])=[CH:13][C:12](=[O:19])[C:11]=2[C:20]=1[CH3:21]

参加物

4

反応物 3

HCID 702EthanolHCID 1118Sulfuric AcidHCID 213925966-chloro-5,7-dimethyl-4-oxo-4H-1-benzopyran-2-carboxylic acid

生成物 1

HCID 54082689HCID 54082689、化合物

実験手順

10 Parts of concentrated sulphuric acid were added to a suspension of 66.1 parts of 6-chloro-5,7-dimethyl-4-oxo-4H-1-benzopyran-2-carboxylic acid in 600 parts of ethanol, and the mixture was heated at reflux for 24 hr. Most of the ethanol was removed by evaporation under reduced pressure, and 1500 parts of water were added to the reaction mixture. The precipitated solid was filtered, dissolved in chloroform and the solution, dried and evaporated, leaving 58.5 parts of 6-chloro-5,7-dimethyl-4-oxo-4H-1-benzopyran-2-carboxylic acid, ethyl ester as a colourless solid. On recrystallisation from ethanol, the product had melting point 114.5°-115.5° C.

後処理

  1. temperaturethe mixture was heated
  2. temperatureat reflux for 24 hr
  3. customMost of the ethanol was removed by evaporation under reduced pressure, and 1500 parts of water
  4. additionwere added to the reaction mixture
  5. filtrationThe precipitated solid was filtered
  6. dissolutiondissolved in chloroform
  7. customthe solution, dried
  8. customevaporated

出典と根拠

ORDレコード
ord-017467d216c84adb802d37aad05eafe2
出典データセット
uspto-grants-1977_12
特許番号
US04064256

関連ノート

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