Potassium Carbonate → 3-(1,3-Oxazol-5-yl)-7-phenylimidazo[1,2-a]pyridine

Participants

Reaction Steps

7-Phenylimidazo[1,2-a]pyridine-3-carbaldehyde (7-1, 0.030 g, 0.14 mmol), tosylmethyl isocyanide (0.032 g, 0.16 mmol) and K2CO3 (0.022 g, 0.16 mmol) were dissolved in 1 ml MeOH and the resulting solution was heated to reflux. After 4 h the reaction was quenched by the addition of water. The resulting mixture was extracted 3× with EtOAc, and the combined extracts were dried over Na2SO4, filtered and concentrated. The residue was purified by flash column chromatography, eluting with a gradient of DCM to 95:5 DCM/MeOH. The product was further purified by reverse phase preparative HPLC to afford the title compound. 1H NMR (CDCl3) δ 8.63 (d, 1H, J=7.1 Hz), 8.52 (s, 1H), 8.27 (s, 1H), 8.25 (s, 1H), 7.78 (m, 2H), 7.74 (dd, 1H, J=1.4, 7.3 Hz), 7.67 (s, 1H), 7.58 (m, 3H). LCMS m/z (M+1) Calc: 262.1, found 262.2.

Provenance & Evidence