Benzene → HCID 21569671, Verbindung

HRID 1579848Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1579848
[O:1]=[C:2]1[CH2:6][CH2:5][C:4](=[O:7])[CH:3]1[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([OH:16])=[O:15].[CH2:17](O)[CH3:18].S(=O)(=O)(O)O.[CH:25]1C=CC=C[CH:26]=1>>[CH2:25]([O:1][C:2]1[CH2:6][CH2:5][C:4](=[O:7])[C:3]=1[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][C:14]([O:16][CH2:17][CH3:18])=[O:15])[CH3:26]

Komponenten

5

Edukt 4

HCID 241BenzeneHCID 702EthanolHCID 1118Sulfuric AcidHCID 10198445HCID 10198445, Verbindung

Produkt 1

HCID 21569671HCID 21569671, Verbindung

Versuchsvorschrift

A mixture containing 26 parts of 2,5-dioxocyclopentaneheptanoic acid, 560 parts of ethanol, 440 parts of benzene and 14.7 parts of concentrated sulfuric acid is slowly distilled over a period of about 40 hours, during which time approximately 200 parts of distillate is collected. The residual mixture is cooled, diluted with approximately 350 parts of ether, then washed successively with dilute aqueous sodium hydroxide and water. The resulting neutral solution is dried over anhydrous sodium sulfate and evaporated by dryness under reduced pressure to afford, as a yellow liquid, ethyl 2-ethoxy-5-oxocyclopent-1-eneheptanoate, which substance is characterized by an ultraviolet absorption maximum at about 253.5 millimicrons.

Aufarbeitung

  1. distillationis slowly distilled over a period of about 40 hours, during which time approximately 200 parts of distillate
  2. customis collected
  3. temperatureThe residual mixture is cooled
  4. additiondiluted with approximately 350 parts of ether
  5. washwashed successively with dilute aqueous sodium hydroxide and water
  6. dry with materialThe resulting neutral solution is dried over anhydrous sodium sulfate
  7. customevaporated by dryness under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-bbd03728d36c45de8451c074ea193d8e
Quelldatensatz
uspto-grants-1976_01
Patentnummer
US03931411

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