[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[O:9][N:10]=[C:11]3[CH:16]=[CH:15][C:14]([CH:17]([C:19]4[CH:24]=[CH:23][C:22]([CH3:25])=[CH:21][CH:20]=4)[OH:18])=[CH:13][C:12]=23)[CH:5]=[CH:6][CH:7]=1>O1CCOCC1.O=[Mn]=O>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[O:9][N:10]=[C:11]3[CH:16]=[CH:15][C:14]([C:17]([C:19]4[CH:20]=[CH:21][C:22]([CH3:25])=[CH:23][CH:24]=4)=[O:18])=[CH:13][C:12]=23)[CH:5]=[CH:6][CH:7]=1A mixture of intermediate 18 (0.071 mol) and MnO2 (0.287 mol) in 1,4-dioxane (250 ml) was stirred at 80° C. for 2 hours, then cooled to room temperature, filtered over celite and washed with DCM. The solvent was evaporated till dryness, yielding 24.7 g (100%) of [3-(3-chlorophenyl)-2,1-benzisoxazol-5-yl](4-methylphenyl)-methanone (intermediate 19).
Wird geladen…