[CH2:1]([O:3][C:4]([N:6]1[CH2:20][CH2:19][C:18]2[C:9](=[N:10][C:11]3[CH:12]=[CH:13][CH:14]=[CH:15][C:16]=3[C:17]=2[O:21][CH3:22])[CH2:8][CH2:7]1)=[O:5])[CH3:2].[OH:23]O>>[CH2:1]([O:3][C:4]([N:6]1[CH2:20][CH2:19][C:18]2[C:9](=[N+:10]([O-:23])[C:11]3[CH:12]=[CH:13][CH:14]=[CH:15][C:16]=3[C:17]=2[O:21][CH3:22])[CH2:8][CH2:7]1)=[O:5])[CH3:2]11-Methoxy-1,2,4,5-tetrahydro-3-azepino[4,5-b]quinoline-carboxylic acid ethyl ester-6-oxide was prepared from 11-methoxy -1,2,4,5-tetrahydro-3-azepino[4,5-b]quinoline-carboxylic acid ethyl ester and hydrogen peroxide analogous to Example 163. Yield: 15% of theory; m.p. 135° C.
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