2-Tert-Butylphenol → 3-(tert-Butyl)-4-hydroxybenzaldehyde

HRID 2951

Reaktionsgleichung

Reaktionsgleichung von HRID 2951
CN([CH:9]=[O:10])C1C=CC=CC=1.P(Cl)(Cl)(Cl)=O.[C:16]([C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=1[OH:26])([CH3:19])([CH3:18])[CH3:17]>>[CH3:18][C:16]([C:20]1[CH:25]=[C:24]([CH:23]=[CH:22][C:21]=1[OH:26])[CH:9]=[O:10])([CH3:19])[CH3:17]

Komponenten

4

Edukt 3

HCID 69232-Tert-ButylphenolHCID 24813Phosphorus oxychlorideHCID 66737N-Methylformanilide

Produkt 1

HCID 30176183-(tert-Butyl)-4-hydroxybenzaldehydeAusbeute 22,6 %

Versuchsvorschrift

Into 101.5 g of N-methylformanilide was added dropwise with cooling 107 g of phosphoryl chloride over a period of 15 minutes. The mixture was allowed to warm to room temperature and stirred for 70 minutes. 67.5 g of ortho-t-butylphenol was added and stirred for about 45 minutes after which the mixture was heated to about 50°-60° C. and allowed to stir for 4.5 hours. The reaction mixture was poured into a volume of crushed ice and extracted with chloroform. The aqueous layer was separated and washed again with chloroform. The chloroform layers were combined and extracted with 2000 ml of a 5% potassium hydroxide solution. The aqueous potassium hydroxide layer was separated and added to 1000 ml of chloroform. The pH of the resulting two-phase mixture was adjusted to 3 with concentrated hydrochloric acid with stirring. The resultant layers were separated and the aqueous layer was again extracted with chloroform and dried over sodium sulfate overnight to give 18.1 g of the desired subtitled intermediate.

Aufarbeitung

  1. stirringstirred for about 45 minutes after which the mixture
  2. temperaturewas heated to about 50°-60° C.
  3. stirringto stir for 4.5 hours
  4. additionThe reaction mixture was poured into a volume of crushed ice
  5. extractionextracted with chloroform
  6. customThe aqueous layer was separated
  7. washwashed again with chloroform
  8. extractionextracted with 2000 ml of a 5% potassium hydroxide solution
  9. customThe aqueous potassium hydroxide layer was separated
  10. additionadded to 1000 ml of chloroform
  11. stirringwith stirring
  12. customThe resultant layers were separated
  13. extractionthe aqueous layer was again extracted with chloroform
  14. dry with materialdried over sodium sulfate overnight

Quellen und Nachweise

ORD-Eintrag
ord-2b92740c81364c30af7dcfcac8c1abbd
Quelldatensatz
uspto-grants-1998_03
Patentnummer
US05731336

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