P-Nitrobenzenesulfonyl 4-nitroimidazole

The reagent is prepared by reaction of p-nitrobenzenesulfonyl chloride with 4-nitroimidazole (triethylamine). ... 

A suspension of 4-nitro-l-(o-nitrobenzenesulfonyl)imidazole (made from 4-nitroimidazole, o-nitrobenzenesulfonyl chloride, and triethylamine) (0.745 g, 2.5mmol) and aniline (l.Og, 11 mmol) in aqueous methanol (1 1 20ml) is stirred and heated at 70°C (2h). The mixture is then steam distilled, and the hot undistilled residue is filtered to give the above product (0.41 g, 87%), m.p. 185-187°C. Cooling of the filtrate results in separation of... 

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