[C:1]([NH:4][C:5]1[CH:12]=[CH:11][C:8]([CH:9]=[O:10])=[CH:7][CH:6]=1)(=[O:3])[CH3:2].[Cl:13][O-].[Na+].O>C(O)(=O)C>[C:1]([NH:4][C:5]1[CH:12]=[CH:11][C:8]([CH:9]=[O:10])=[CH:7][C:6]=1[Cl:13])(=[O:3])[CH3:2]To a solution of 6.43 g (0.039 mole) 4-acetamidobenzaldehyde (14) (Aldrich, A180-0) in 55 mL of glacial acetic acid, was added 100 mL of 5.25% solution of sodium hypochlorite (Clorox, Pathmark brand) and the reaction mixture was stirred at room temperature for 48 hours. A white precipitate developed in the reaction mixture when a sample of the reaction mixture was taken off for TLC. The mixture was poured into 100 mL water and filtered to give 2.5 g (32%) of 24 as white powder, mp 110-113°. Infrared (IR) and NMR analysis gave the following results:
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