反应详情

A solution of 5-bromo-7-[5-(4-fluorobenzyl)-4H-1,2,4-triazol-3-yl)-1,6-naphthyridin-8-ol (10 mg, 0.03 mmol) and piperazin-2-one (60 mg, 0.60 mmol) in 1-methylpyrrolidin-2-one (2 mL) was heated at 150° C. for 18 hours. The resultant solution was cooled to room temperature and water was added. The solids which formed were removed by filtration and further purified by prep HPLC to give 4-{7-[5-(4-Fluorobenzyl)-4H-1,2,4-triazol-3-yl]-8-hydroxy-1,6-naphthyridin-5-yl}piperazin-2-one (7 mg, 67%) as a white solid. 1H NMR (CD3OD/CDCl3): δ 9.03 (d, J=4.4 Hz, 1 H), 8.48 (d, J=8.4 Hz, 1 H), 7.64 (dd, J=8.4, 4.4 Hz, 1 H), 7.32 (dd, J=8.4, 5.6Hz, 2 H), 6.97 (t, J=8.4Hz, 2 H). 4.13 (s, 2 H), 4.10 (5,2 H), 3.60 (m, 2 H), 3.42 (m, 2 H); 19F NMR (CD3OD/CDCl3): δ −117.93; MS m/z 420 (M+1).

1. customThe solids which formed
2. customwere removed by filtration
3. customfurther purified by prep HPLC