OO.S(=O)(=O)(O)O.[Cl:8][C:9]1[CH:31]=[CH:30][C:12]2[C:13]3[C:14](=[CH:25][NH:26][C:27]=3[CH2:28][CH3:29])[CH2:15][N:16]=[C:17]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[Cl:24])[C:11]=2[CH:10]=1.S(=O)(O)[O-:33].[Na+]>C(O)(=O)C>[Cl:8][C:9]1[CH:31]=[CH:30][C:12]2[C:13]3[CH:27]([CH2:28][CH3:29])[NH:26][C:25](=[O:33])[C:14]=3[CH2:15][N:16]=[C:17]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[Cl:24])[C:11]=2[CH:10]=1In one portion, 0.9 ml (7.9 mmol) of 30% hydrogen peroxide was added to 40 ml of a 1% solution of concentrated sulfuric acid in acetic acid. After stirring for 1 hour, 2.0 g (5.6 mmol) of 8-chloro-6-(2-chlorophenyl)-1-ethyl-2H,4H-pyrrolo[3,4-d][2]benzazepine were added, and the resulting mixture was stirred for 20 minutes. The excess peracid was discharged by the addition of saturated aqueous sodium bisulfite solution, and the mixture was concentrated at reduced pressure. The residue was partitioned between methylene chloride and water and neutralized with concentrated ammonium hydroxide solution. The methylene chloride solution was washed with brine, dried over anhydrous sodium sulfate, and concentrated at reduced pressure. The resulting oil was crystallized from ether to give 8-chloro-6-(2-chlorophenyl)-1-ethyl-1,4-dihydropyrrolo[3,4-d][2]benzazepin-3(2H)-one as yellow prisms, mp 233°-235° C. Recrystallization from a mixture of ethyl acetate and methanol gave colorless prims, mp 236°-237° C.
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