Reaktionsgleichung
[Cl:1][CH:2]([Cl:24])[C:3]([N:5]1[C@H:9]([CH2:10][F:11])[C@@H:8]([C:12]2[CH:17]=[CH:16][C:15]([S:18]([CH3:21])(=[O:20])=[O:19])=[CH:14][CH:13]=2)[O:7]C1(C)C)=[O:4].O.C1(C)C=CC(S(O)(=O)=O)=CC=1>C(Cl)Cl>[Cl:24][CH:2]([Cl:1])[C:3]([NH:5][C@H:9]([CH2:10][F:11])[C@@H:8]([C:12]1[CH:13]=[CH:14][C:15]([S:18]([CH3:21])(=[O:20])=[O:19])=[CH:16][CH:17]=1)[OH:7])=[O:4]Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 22.5 °C
Versuchsvorschrift
(4S,5R)-3-dichloroacetyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine (Compound XIIIa) (60.5 g, 0.1519 moles) selectively hydrolyses in methylene chloride (300 mL) and water (100 mL) containing p-toluene sulfonic acid at 60° C. over several hours. Removal of the methylene chloride by distillation and cooling to 20-25° C. precipitates the product. Filtration, washing with water (100 mL) and toluene (100 mL) then drying yields (1R,2S)-2-dichloroacetamido-3-fluoro-1-[4-(methylsulfonyl)phenyl]-1-propanol (Florfenicol).
Aufarbeitung
- customRemoval of the methylene chloride
- distillationby distillation
- customprecipitates the product
- filtrationFiltration
- washwashing with water (100 mL) and toluene (100 mL)
- customthen drying
Quellen und Nachweise
- ORD-Eintrag
- ord-99953e722d6c4099858c77f508493564
- Quelldatensatz
- uspto-grants-2010_08
- Patentnummer
- US07786329B2
Verknüpfte Notizen
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