Sodium Carbonate → HCID 86723585, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-benzyl-8-bromo-1,6-naphthyridin-5(6H)-one (0.260 g, 0.82 mmol), (3,5-dimethylisoxazol-4-yl)boronic acid (0.174 g, 1.24 mmol) and Na2CO3 (0.262 g, 2.47 mmol) in toluene (25 mL), ethanol (15 mL) and water (5 mL) was degassed. Pd(PPh3)4 (0.095 g, 0.08 mmol) was then added and the reaction heated at 95° C. for 17 h. After that time the reaction was cooled to rt and concentrated under reduced pressure. The residue was dissolved in ethyl acetate (100 mL), washed with water and brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 99:1 ethyl acetate/methanol) to give 6-benzyl-8-(3,5-dimethylisoxazol-4-yl)-1,6-naphthyridin-5(6H)-one (0.180 g, 66%) as a white solid: mp 192-195° C.; 1H NMR (400 MHz, CDCl3) δ 8.92 (dd, J=4.5, 1.9 Hz, 1H), 8.78 (dd, J=8.0, 1.9 Hz, 1H), 7.47 (dd, J=8.0, 4.5 Hz, 1H), 7.30-7.41 (m, 5H), 7.20 (s, 1H), 5.27 (s, 2H), 2.25 (s, 3H), 2.11 (s, 3H); ESI MS m/z 332 [M+H]+.

Provenance & Evidence