p-Toluenesulfonic acid → 4'-[(S)-2-methylbutoxycarbonyl]biphenyl-4-ol

HRID 344973

Reaktionsgleichung

Reaktionsgleichung von HRID 344973
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:13]=[CH:12][C:11]([C:14]([OH:16])=[O:15])=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.[CH3:17][C@@H:18]([CH2:21][CH3:22])[CH2:19]O.C1(C)C=CC(S(O)(=O)=O)=CC=1>>[OH:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[CH:13]=[CH:12][C:11]([C:14]([O:16][CH2:17][C@@H:18]([CH3:19])[CH2:21][CH3:22])=[O:15])=[CH:10][CH:9]=2)=[CH:6][CH:7]=1

Komponenten

4

Edukt 3

HCID 6101p-Toluenesulfonic acidHCID 3015564'-Hydroxy-4-biphenylcarboxylic acidHCID 2723602(S)-2-methyl-1-butanol

Produkt 1

HCID 139075384'-[(S)-2-methylbutoxycarbonyl]biphenyl-4-olAusbeute 41 %

Versuchsvorschrift

3.75 g of 4-hydroxybiphenyl-4'-carboxylic acid was heated under reflux together with (S)-2-methylbutyl alcohol in the presence of 0.10 g of p-toluenesulfonic acid for about 6 hours. Then the mixture was filtered to remove the unreacted 4-hydroxybiphenyl-4'-carboxylic acid. Next, the filtrate was evaporated and the unreacted (S)-2-methylbutyl alcohol was distilled off. The crystals thus obtained were recrystallized from 200 ml of n-hexane. Thus, 2.05 g of the corresponding colorless compound was obtained (Yield: 41%).

Aufarbeitung

  1. filtrationThen the mixture was filtered
  2. customto remove the unreacted 4-hydroxybiphenyl-4'-carboxylic acid
  3. customNext, the filtrate was evaporated
  4. distillationthe unreacted (S)-2-methylbutyl alcohol was distilled off
  5. customThe crystals thus obtained
  6. customwere recrystallized from 200 ml of n-hexane

Quellen und Nachweise

ORD-Eintrag
ord-cf17dec162e3440886c834555d7b68d0
Quelldatensatz
uspto-grants-1991_10
Patentnummer
US05055225

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