Potassium → Dimethylsulfamic acid [4,5-difluoro-6-(2-fluoro-4-iodo-phenylamino)-benzooxazol-7-yl]amide

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Reaction Steps

Compound 1C was prepared from 4,5-difluoro-6-(2-fluoro-4-iodo-phenyl)-7-oxo-6,7-dihydro-imidazo[4′,5′:3,4]benzo[1,2-d]oxazole-8-sulfonic acid dimethylamide (60 mg, 0.12 mmol) and potassium trimethylsilonolate (30 mg, 0.18 mmol) using procedures analogous to those described above for Compound 1A to afford 30 mg of the product (49% yield). H1NMR (CDCl3, 300 MHz): δ 8.15 (s, 1H), 7.44 (dd, 1H), 7.29 (d, 1H), 6.82 (s, 1H), 6.45-6.35 (m, 1H), 6.19 (s, 1H), 2.88 (s, 6H). LCMS: 81.2%, m/z=510.9 (M−1). HPLC: 80.5%.

Provenance & Evidence