Acetic Acid → 4-Chloro-3,5-difluoro-2-(1-hydroxy-2-propyl)pyridine

HRID 1873Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1873
[Cl:1][C:2]1[C:7]([F:8])=[CH:6][N:5]=[C:4]([CH:9]([CH3:18])[CH2:10][O:11]C2CCCCO2)[C:3]=1[F:19].O.C(O)(=O)C>C1COCC1>[Cl:1][C:2]1[C:7]([F:8])=[CH:6][N:5]=[C:4]([CH:9]([CH3:18])[CH2:10][OH:11])[C:3]=1[F:19]

Komponenten

5

Edukt 3

HCID 176Acetic AcidHCID 962WaterHCID 540115134-Chloro-3,5-difluoro-2-(1-(2-tetrahydropyranyl)oxy-2-propyl)pyridine

Produkt 1

HCID 543283394-Chloro-3,5-difluoro-2-(1-hydroxy-2-propyl)pyridine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
45 °C

Versuchsvorschrift

The product of Step 1 is dissolved in 200 mL of 2:1 THF:water and to this solution is added 6 mL of acetic acid. The reaction mixture is heated at 45° C. for approximately 5 hours. The THF is removed under reduced pressure and the aqueous reaction mixture is adjusted to a pH in the range of 8 to 9 with 10% sodium carbonate and is then extracted with methylene chloride. The organic layer is dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to afford the title compound.

Aufarbeitung

  1. customThe THF is removed under reduced pressure
  2. extractionis then extracted with methylene chloride
  3. dry with materialThe organic layer is dried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-4f295b3d715849a297bcad06075e2348
Quelldatensatz
uspto-grants-1998_03
Patentnummer
US05726182

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