2,6-Difluorobenzoyl chloride → 5-Amino-2-(2,6-difluorophenyl)oxazole-4-carbonitrile

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To a solution of aminomalononitrile p-toluenesulfonate (0.050 g, 0.2 mmol) in NMP (0.5 mL) was added 2,6-difluorobenzoyl chloride (27 ul, 0.21 mmol) and the resulting solution heated in the microwave at 120° C. for 5 minutes. The solution was diluted with EtOAc and water. The organic phase was washed with water and brine, dried over MgSO4 and the solvent removed in vacuo to afford 5-amino-2-(2,6-difluorophenyl)oxazole-4-carbonitrile (0.030 g, 0.14 mmol, 69%) as an off-white solid. 1H NMR (DMSO) δ 7.30 (2H, t), 7.61 (1H, m), 8.14 (2H, br. s). LCMS (1) Rt: 1.59 min; m/z (ES+) 222.

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