[F:1][C:2]1[CH:3]=[C:4]([N:8]2[CH2:12][C@H:11]([CH2:13]OS(C)(=O)=O)[O:10][C:9]2=[O:19])[CH:5]=[CH:6][CH:7]=1.[C:20]1(=[O:30])[NH:24][C:23](=[O:25])[C:22]2=[CH:26][CH:27]=[CH:28][CH:29]=[C:21]12.[K]>CN(C=O)C>[F:1][C:2]1[CH:3]=[C:4]([N:8]2[CH2:12][C@@H:11]([CH2:13][N:24]3[C:20](=[O:30])[C:21]4[C:22](=[CH:26][CH:27]=[CH:28][CH:29]=4)[C:23]3=[O:25])[O:10][C:9]2=[O:19])[CH:5]=[CH:6][CH:7]=1A 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).
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