反应详情

温度

22.5 °C

(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).

1. customRemoval of the methylene chloride
2. distillationby distillation
3. customprecipitates the product
4. filtrationFiltration
5. washwashing with water (100 mL) and toluene (100 mL)
6. customthen drying