[N:1]1[S:5][N:4]=[C:3]2[CH:6]=[C:7]([CH2:10][OH:11])[CH:8]=[CH:9][C:2]=12>ClCCl.[O-2].[O-2].[Mn+4]>[N:1]1[S:5][N:4]=[C:3]2[CH:6]=[C:7]([CH:10]=[O:11])[CH:8]=[CH:9][C:2]=12This was prepared by oxidation of benzo[1,2,5]thiadiazol-5-yl-methanol (2a) with manganese dioxide in dichloromethane by the method of Example (4c).
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