5-(Benzenesulfinyl)-2-nitroaniline → 4-(Benzenesulfinyl)benzene-1,2-diamine

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Reaction Steps

5.4 G. of 2-amino-4-phenylsulfinyl-1-nitrobenzen is hydrogenated at 1 atmosphere pressure in 500 ml. methanol in the presence of 5 g. 5% palladized carbon, until the theoretical uptake of hydrogen has occurred. The catalyst is removed by filtration and the filtrate stripped under vacuum. The residue is recrystallized from methanol-benzene, yielding 1,2-diamino-4-phenylsulfinylbenzene.

Provenance & Evidence