Butyl bromide → 4-Butoxy-2,6-dimethylazobenzene

HRID 1732237Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1732237
[Na].[CH3:2][C:3]1[CH:8]=[C:7]([OH:9])[CH:6]=[C:5]([CH3:10])[C:4]=1[N:11]=[N:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.Br[CH2:20][CH2:21][CH2:22][CH3:23]>C(O)C>[CH2:20]([O:9][C:7]1[CH:6]=[C:5]([CH3:10])[C:4]([N:11]=[N:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)=[C:3]([CH3:2])[CH:8]=1)[CH2:21][CH2:22][CH3:23]

Komponenten

5

Edukt 3

HCID 8002Butyl bromideHCID 33198223,5-Dimethyl-4-(phenyldiazenyl)phenolHCID 5360545Sodium

Produkt 1

HCID 537623114-Butoxy-2,6-dimethylazobenzene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To a solution of sodium (2.0 g, 0.09 mole) in absolute ethanol (119 ml) was added 2,6-dimethyl-4-hydroxyazobenzene (18.3 g, 0.08 mole) prepared according to B. C. Saunders and G. H. R. Watson, Biochem. J. 46:629-233 (1950). To the resulting orange-red solution was added 1-bromobutane (22.3 g, 0.162 mole) slowly from a separatory funnel and the mixture was refluxed for five hours. When cool, the precipitated sodium bromide was filtered off and the filtrate was evaporated to dryness. The residue was taken up in ether and the ether solution was extracted, first with 0.5 M sodium hydroxide and then once with water. The ether phase was dried (Na2SO4), filtered, and evaporated to dryness. The yield was over 90%. This material is satisfactory for the next step. After recrystallization from 95% ethanol, it melted at 47°-47.5° C.

Aufarbeitung

  1. customprepared
  2. temperaturethe mixture was refluxed for five hours
  3. temperatureWhen cool
  4. filtrationthe precipitated sodium bromide was filtered off
  5. customthe filtrate was evaporated to dryness
  6. extractionthe ether solution was extracted, first with 0.5 M sodium hydroxide
  7. dry with materialThe ether phase was dried (Na2SO4)
  8. filtrationfiltered
  9. customevaporated to dryness
  10. customAfter recrystallization from 95% ethanol, it melted at 47°-47.5° C.

Quellen und Nachweise

ORD-Eintrag
ord-bde386deda1b421894e6605daaa7c3d2
Quelldatensatz
uspto-grants-1980_12
Patentnummer
US04237068

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