2-Bromoacetamidopyridine → 2-(3-Chlorophenyl)-4-(pyridin-2-yl)-1,3-oxazole

関与物質

反応手順

Using the procedures of Kelly et al., J. Org. Chem., (1996) 61:4623-4633, a solution of 2-bromoacetylpyridine (120 mg, 0.6 mmol) in toluene (5 mL) was treated with 3-chlorobenzamide (300 mg, 1.9 mmol) and the mixture heated in a sealed vial at reflux for 60 hours. The mixture was then cooled and the solvent was removed in vacuo. Silica gel chromatography using a gradient of hexane to ethyl acetate afforded 38 mg (9%) of 2-[3-chlorophenyl]-4-[pyridin-2-yl]-1,3-oxazole as a pale yellow solid. 1H-NMR (CDCl3), δ (ppm): 8.62 (d, 1H), 8.35 (s, 1H), 8.15 (m, 1H), 8.00 (m, 2H), 7.80 (td, 1H), 7.42 (m, 2H), 7.23 (m, 1H).

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