Acetic Anhydride → N-[2-Nitro-5-(phenylsulfanyl)phenyl]acetamide

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Reaction Steps

5 G. of 2-amino-4-chloro-1-nitrobenzene is added to a solution of sodium phenyl mercaptide, prepared under nitrogen from 2.53 g. 57% sodium hydride and 6.2 ml. thiophenol in 20 ml. dimethylformamide, with a 10 ml. dimethylformamide rinse. The mixture is stirred under nitrogen for three hours at 20°-30° C and then diluted with water. The crude product is washed with water and hexane, then recrystallized from methanol, yielding 2-amino-4-phenylthio-1-nitrobenzene. 6.0 G. of 2-amino-4-phenylthio-1-nitrobenzene is dissolved in 80 ml. acetic anhydride and treated with a few drops of sulfuric acid. The mixture is left at 20°-30° C for 2 hours then a little sodium acetate added and the solvent removed under vacuum. The residue is treated with water, filtered and recrystallized from methanol yielding 2-acetamido-4-phenylthio-1-nitrobenzene. This material may also be obtained by reaction of 2-acetamido-4-chloro1-nitrobenzene with sodium phenylmercaptide essentially as described above for the free amine.

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