反应详情

温度

150 °C

A mixture of 5-bromo-2-(2,6-difluorophenyl)oxazole-4-carbonitrile (0.050 g, 0.16 mmol), tri-n-butyl(2-pyridyl)tin (0.120 g, 0.32 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.010 g, 0.008 mmol) in acetonitrile (2.5 mL) was heated in the microwave for 15 minutes at 150° C. The reaction was diluted with MeOH and passed through a MP-SH resin cartridge (0.5 g), then purified by SPE using a MP-TsOH resin (500 mg) cartridge and the solvent removed in vacuo. The residue was purified by preparative HPLC to afford 2-(2,6-difluorophenyl)-5-(pyridin-2-yl)oxazole-4-carboxamide (0.029 g, 0.10 mmol, 58%) as a white solid. 1H NMR (DMSO) 7.41 (2H, t), 7.55 (1H, ddd), 7.76 (1H, m), 7.88 (1H, br. s), 8.06 (1H, ddd), 8.32 (1H, dt), 8.77 (1H, ddd), 9.10 (1H, br. s). LCMS (2) Rt: 2.23 min; m/z (ES+) 302.

1. custompurified by SPE
2. customthe solvent removed in vacuo
3. customThe residue was purified by preparative HPLC