Potassium Bromide → 3-[4-(3-Phenyl-ureido)-phenyl]-isoxazole-5-carboxylic acid

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The title compound was prepared from 3-[4-(3-phenyl-ureido)-phenyl]-isoxazole-5-carboxylic acid ethyl ester as set forth in example 8 and was obtained in 95.6% yield. Mass (ES+): 324 (M++1); IR (KBr): 3312, 1711, 1645, 1599, 1461; 1H NMR (DMSO-d6) δ: 6.97 (t, 1H), 7.28 (t, 2H), 7.45 (d, 2H), 7.59 (d, 2H), 7.71 (s, 1H), 7.87 (d, 2H), 8.76 (s, 1H), 8.96 (s, 1H).

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