反应详情

A solution of methanesulfonic acid 3-fluoro-propyl ester (34.5 g, 221 mmol) in 250 mL of anhydrous DMF was treated with solid potassium phthalimide (49 g, 265 mmol, 1.2 equiv) at 25° C. The resulting suspension was warmed to 70–80° C. for 2 hours. When 1H NMR showed that the reaction was complete, the reaction mixture was treated with H2O (200 mL). The aqueous solution was extracted with EtOAc (3×100 mL). The combined organic layers were washed with H2O (3×100 mL) and dried over MgSO4. The solvent was removed in vacuo to afford the desired 2-(3-fluoro-propyl)-isoindole-1,3-dione (45.4 g, 45.5 g theoretical, 99.7% yield) as a white powder.

1. temperatureThe resulting suspension was warmed to 70–80° C. for 2 hours
2. extractionThe aqueous solution was extracted with EtOAc (3×100 mL)
3. washThe combined organic layers were washed with H2O (3×100 mL)
4. dry with materialdried over MgSO4
5. customThe solvent was removed in vacuo