반응 단계
To a slurry of N-(8-{[(2R)-2-hydroxy-3-(piperidin-1-yl)propyl]oxy}-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-5-yl)amine (0.125 g, 0.34 mmol) and nicotinic acid (0.052 g, 0.42 mmol, 1.3 equiv.) in DMF 3.6 mL) was added PyBOP (0.218 g, 0.42 mmol, 1.3 equiv.) followed by diisopropylethylamine (0.23 mL, 1.34 mmol, 4.0 equiv.). The resulting mixture was stirred at room temperature. After a few hours the mixture turned to a clear solution. The resulting solids were removed by filtration, washed sequentially with DMF, water, then MeOH, and dried at 50° C. under reduced pressure to afford N-(8-{[(2R)-2-hydroxy-3-(piperidin-1-yl)propyl]oxy}-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-5-yl)pyridine-3-carboxamide (0.11 g, 66%): HPLC ret. time 1.00 min.; 1H NMR (DMSO-d6+1 drop TFA-d) δ 1.30, 1.44 m, 1H), 1.58-1.71 (m, 2H), 1.72-1.85 (m, 3H), 2.89-3.56 (m, 2H), 3.18 (dd, J=10.1, 13.1 Hz, 1H), 3.25-3.31 (m, 1H), 3.45-3.52 (m, 2H), 4.03 (s, 3H), 4.20-4.29 (m, 4H), 4.38-4.49 (m, 1H), 4.53-4.60 (m, 2H), 7.48 (d, J=9.4 Hz, 1H), 7.85 (dd, J=5.3, 7.9 Hz, 1H), 8.04 (d, J=9.1 Hz, 1H), 8.82 (br d, J=8.1 Hz, 1H), 8.93 (dd, J=1.5, 5.3 Hz, 1H), 9.47 (d, J=1.5 Hz, 1H); mass spectrum m/z 479 ((M+1)+, 0.4%).
