[N+]([C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[C:9](=[O:13])[N:8]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[C:7]2=[O:20])([O-])=O.[F:21][C:22]1[CH:27]=[CH:26][C:25]([O-:28])=[CH:24][CH:23]=1.[Na+].Cl>CN(C=O)C>[F:21][C:22]1[CH:27]=[CH:26][C:25]([O:28][C:11]2[CH:12]=[CH:4][CH:5]=[C:6]3[C:10]=2[C:9](=[O:13])[N:8]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:7]3=[O:20])=[CH:24][CH:23]=15-Nitro-2-phenylisoindole-1,3-dione (5.9 g, 22 mmol) was dissolved in DMF (40 ml) and sodium 4-fluorophenolate (3.1 g, 23.1 mmol) was added. The resulting mixture was stirred at 100° C. for 2 hours under an argon atmosphere. The mixture was allowed to cool to RT then poured into 4% aqueous HCl. The yellow precipitate which formed was filtered off, washed with water and recrystallised (DCM/TBME) to yield (4-fluorophenoxy)-2-phenylisoindol-1,3-dione (2.4 g, 41%);
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