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Methanol → 3,3-Bis(4-fluorophenyl)-2-[1-(1-methylethyl)-1H-tetrazol-5-yl]-2-propenoic acid

HRID 1195333
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1195333
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([C:23]2[CH:28]=[CH:27][C:26]([F:29])=[CH:25][CH:24]=2)=[C:9]([C:15]2[N:19]([CH:20]([CH3:22])[CH3:21])[N:18]=[N:17][N:16]=2)[C:10]([O:12]CC)=[O:11])=[CH:4][CH:3]=1.O1CCCC1.CO.[Li+].[OH-]>OS(O)(=O)=O>[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([C:23]2[CH:28]=[CH:27][C:26]([F:29])=[CH:25][CH:24]=2)=[C:9]([C:15]2[N:19]([CH:20]([CH3:22])[CH3:21])[N:18]=[N:17][N:16]=2)[C:10]([OH:12])=[O:11])=[CH:4][CH:3]=1
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Komponenten

6

Edukt 4

HCID 887MethanolHCID 3939Lithium HydroxideHCID 8028TetrahydrofuranHCID 14723869ethyl 3,3-bis(4-fluorophenyl)-2-[1-(1-methylethyl)-1H-tetrazol-5-yl]-2-propenoate

Produkt 1

HCID 147238703,3-Bis(4-fluorophenyl)-2-[1-(1-methylethyl)-1H-tetrazol-5-yl]-2-propenoic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1118
Sulfuric Acid
Lösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a chilled (0° C.) solution of ethyl 3,3-bis(4-fluorophenyl)-2-[1-(1-methylethyl)-1H-tetrazol-5-yl]-2-propenoate (0.95 g, 2.39 mmoles) in 20 mL of 1:1 (v/v) mixture of tetrahydrofuran and methanol was added an aqueous solution of LiOH (4.0 mL, 3 Molar) in one single portion. The reaction mixture was stirred at 0° C. for 15 minutes followed by warming up to ambient temperature. Saponification was allowed to proceed at room temperature for four hours forming a very pale clear solution. The crude reaction mixture was diluted with 12 mL of 2M H2SO4 and the product was extracted into diethyl ether (40 mL×2). The organic layers were combined, dried over MgSO4, concentrated under reduced pressure and then vigorously dried under high vacuum (0.01 mmHg) at room temperature for 24 hours to yield the title compound. The propenoic acid was then utilized in the next step without further purification.

Aufarbeitung

  1. temperatureby warming up to ambient temperature
  2. waitto proceed at room temperature for four hours
  3. customforming a very pale clear solution
  4. customThe crude reaction mixture
  5. extractionthe product was extracted into diethyl ether (40 mL×2)
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated under reduced pressure
  8. customvigorously dried under high vacuum (0.01 mmHg) at room temperature for 24 hours

Quellen und Nachweise

ORD-Eintrag
ord-bf2b5c7ea8744559b59a5beb9fd1777c
Quelldatensatz
uspto-grants-1992_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05110940

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