Acetazolamide → 4-(5-Acetylamino-[1,3,4]thiadiazole-2-sulfonylamino)-3-hydroxy-4-oxo-but-2-enoic acid (4-fluoro-benzyl)-methoxy-amide

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2-(2,2-Dimethyl-5-oxo-[1,3]dioxolan-4-ylidene)-N-(4-fluoro-benzyl)-N-methoxy-acetamide was treated with N-(5-sulfamoyl-[1,3,4]thiadiazol-2-yl)-acetamide as described in the preparation of compound 1 to yield the title compound. LCMS (M+H) calcd for C16H17FN5O7S2: 474.1; found: 474.1. 1H NMR (500 MHz, DMSO) δ: 2.21 (s, 3), 3.62 (s, 3), 4.72 (s, 2), 6.32 (s, 1), 6.95 (m, 2), 7.22 (m, 2).

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