Sulfuric Acid → 1,4-Bis(3-Hydroxyphenoxy)Butane

HRID 5534

Reaktionsgleichung

Reaktionsgleichung von HRID 5534
[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].Br[CH2:10][CH2:11][CH2:12][CH2:13]Br.[OH-:15].[K+].S(=O)(=O)(O)O>O>[OH:2][C:1]1[CH:3]=[C:4]([CH:6]=[CH:7][CH:8]=1)[O:5][CH2:10][CH2:11][CH2:12][CH2:13][O:15][C:4]1[CH:6]=[CH:7][CH:8]=[C:1]([OH:2])[CH:3]=1

Komponenten

6

Edukt 4

HCID 1118Sulfuric AcidHCID 5054ResorcinolHCID 80561,4-DibromobutaneHCID 14797Potassium Hydroxide

Produkt 1

HCID 200959591,4-Bis(3-Hydroxyphenoxy)Butane

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel4×

Versuchsvorschrift

A five neck five liter round bottom flask equipped with a mechanical stirrer, two condensers, and a dropping funnel is purged with nitrogen then charged under a nitrogen blanket with 1.5 kg (13.6 moles) resorcinol, 120 grams deionized water, and 138.75 grams (0.64 moles) 1,4-dibromobutane. The reaction slurry is slowly heated with stirring to reflux under a slow nitrogen purge; then a solution of 109 grams (1.64 moles) 85% KOH pellets in 109 grams water is added dropwise under a nitrogen blanket over a two hour period. After an additional hour of refluxing, the reaction mixture is allowed to coil enough to pour the contents into 10 liters deionized water. The water slurry is acidified with 30% sulfuric acid and allowed to stand at room temperature overnight before filtering under reduced pressure and washing with several portions of warm water. The residue, 80 grams of yellow amorphous solid, is then extracted with large quantities of boiling water to remove oils. After cooling to room temperature, the water extracts (14 liters) yield 28 grams of white, shiny platelets. HPLC analysis reveals 92% purity by peak area. Recrystallization from acetone yielded product of >98% purity by HPLC analysis with a melting point of 103° C.-106° C. (literature melting point, 105° C.-108° C.) for use in examples 10, 18 and 20. Both 1H and 13C NMR spectra are consistent with the proposed structure.

Aufarbeitung

  1. customA five neck five liter round bottom flask equipped with a mechanical stirrer
  2. customtwo condensers, and a dropping funnel is purged with nitrogen
  3. temperatureThe reaction slurry is slowly heated
  4. temperatureto reflux under a slow nitrogen
  5. custompurge
  6. temperatureAfter an additional hour of refluxing
  7. additionto pour the contents into 10 liters
  8. filtrationbefore filtering under reduced pressure
  9. washwashing with several portions of warm water
  10. extractionThe residue, 80 grams of yellow amorphous solid, is then extracted with large quantities of boiling water
  11. customto remove oils
  12. customRecrystallization from acetone yielded product of >98% purity by HPLC analysis with a melting point of 103° C.-106° C. (literature melting point, 105° C.-108° C.) for use in examples 10, 18 and 20

Quellen und Nachweise

ORD-Eintrag
ord-0d6c5b16d69b4534bf86c0fb3c59c329
Quelldatensatz
uspto-grants-1993_09
Patentnummer
US05244998

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