Phthalimide potassium salt → (5R)-2-[3-(3-fluoro-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-isoindole-1,3-dione

A solution of mesylate 109 (2.89 g, 10.0 mmol) in anhydrous DMF (20 mL) was treated with solid potassium phthalimide (2.22 g, 70.0 mmol, 1.2 equiv) at 25° C., and the resulting reaction mixture was warmed to 70° C. for 4 h. When TLC and HPLC showed the reaction was complete, the reaction mixture was cooled to room temperature before being quenched with H2O (60 mL). The resulting mixture was stirred at room temperature for 10 min before being cooled to 0-5° C. for 1 h. The white precipitate was collected by filtration, washed with water (2×40 mL), and dried in vacuo to afford the desired (5R)-2-[3-(3-fluoro-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-isoindole-1,3-dione 110 (3.12 g, 91.8% yield) as an off-white powder. This product was directly used in subsequent reactions without further purification. C18H13FN2O4, LCMS (EI) m/e 341 (M++H).

1. customthe resulting reaction mixture
2. temperaturethe reaction mixture was cooled to room temperature
3. custombefore being quenched with H2O (60 mL)
4. temperaturebefore being cooled to 0-5° C. for 1 h
5. filtrationThe white precipitate was collected by filtration
6. washwashed with water (2×40 mL)
7. customdried in vacuo

ORD record

ord-ebd4189f298c4ce386874ef823eeda50

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08895741B2