2-Amino-5-Nitrothiazole → 2-Bromo-N-(5-nitro-thiazol-2-yl)-acetamide

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To a stirred solution of 2-amino-5-nitrothiazole (725.7 mg) in ethyl acetate (50 mL) in the presence of saturated sodium carbonate (10 mL) at 0° C., is added bromoacetyl bromide (434.3 uL), and additional bromoacetyl bromide is added to complete the reaction. The organic layer is separated, washed with 3 N HCl solution, followed by brine and dried over sodium sulfate and concentrated in vacuo to give a brown oil. The crude product is purified by silica gel column chromatography (40% ethyl acetate/hexanes) to give a solid (950 mg). ESI MS m/z 266 (M+H+); 1H NMR (400 MHz, CDCl3) δ 8.26 (s, 1H), 3.98 (s, 2H).

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