Phthalimide potassium salt → (5R)-2-[3-(3-fluoro-phenyl)-2-oxo-oxazolidin-5-ylmethyl]-isoindole-1,3-dione
Reaction equation
[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]=1Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 70 °C
Procedure
A solution of mesylate 97 (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 (phthalimide 98, 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).
Workup
- customthe resulting reaction mixture
- temperaturethe reaction mixture was cooled to room temperature
- custombefore being quenched with H2O (60 mL)
- temperaturebefore being cooled to 0–5° C. for 1 h
- filtrationThe white precipitate was collected by filtration
- washwashed with water (2×40 mL)
- customdried in vacuo
Sources & evidence
- ORD record
- ord-2edda15c6f56409086287986c35f4743
- Source dataset
- uspto-grants-2006_10
- Patent number
- US07129259B2
Reaction notes
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