Butylamine → N-butyl-2-[(pyridin-3-ylamino)sulfonyl]benzamide

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The title compound was prepared according to procedures described above, using methyl 2-[(pyridin-3-ylamino)sulfonyl]benzoate and n-butylamine. The title compound was further purified by dissolving 2.0 g in ethyl acetate (10 mL). Hexane was then added dropwise to the solution until it became cloudy. A few drops of ethyl acetate were then added to obtain a clear solution. The resulting solution was left at rt for approximately 48 h. The resulting solids were collected, washed with 20% ethyl acetate/hexane (3×150 mL), and dried under high vacuum overnight at rt to afford the title compound as a crystalline solid (1.64 g, 82%). 1H NMR (400 MHz, DMSO-D6) δ 9.90-10.00 (m, 1H) 8.73 (t, 1H) 8.28-8.37 (m, 2H) 7.71-7.76 (m, 1H) 7.61-7.70 (m, 2H) 7.49-7.57 (m, 2H) 7.35-7.44 (m, 1H) 3.25 (q, 2H) 1.51-1.54 (m, 2H) 1.29-1.40 (m, 2H) 0.90 (t, 3H).

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