反应详情

2,4-Dichloro-5-phenylquinazoline (1.38 g, 5.03 mmol) was dissolved in THF (80 mL) and triethylamine (1.33 mL, 9.56 mmol) was added dropwise. The mixture was stirred for 5 min at room temperature and then pyridin-2-ylmethanamine (0.57 mL, 5.53 mmol) was added dropwise. The resulting mixture was stirred at ambient temperature for 14 hours. After this time, the mixture was filtered through a medium porosity glass frit, concentrated to dryness under reduced pressure and then purified by ISCO flash column chromatography (80 g silica gel column) eluting with 0-100% ethyl acetate/hexanes over 30 min to provide 2-chloro-5-phenyl-N-(pyridin-2-ylmethyl)quinazolin-4-amine (1.32 g, 75%). LCMS Method A [M+1] observed 347.1. HPLC Method B: Purity 99.1% retention time 6.66 min. 1H NMR (400 MHz, chloroform-d) δ ppm 8.16 (1H, d, J=4.77 Hz), 7.79 (1H, d, J=7.28 Hz), 7.70 (1H, t, J=7.78 Hz), 7.59 (1H, dt, J=7.53, 1.51 Hz), 7.40-7.55 (5H, m), 7.08-7.25 (4H, m), 4.66 (2H, d, J=4.02 Hz).

1. stirringThe resulting mixture was stirred at ambient temperature for 14 hours
2. filtrationAfter this time, the mixture was filtered through a medium porosity glass frit
3. concentrationconcentrated to dryness under reduced pressure
4. custompurified by ISCO flash column chromatography (80 g silica gel column)
5. washeluting with 0-100% ethyl acetate/hexanes over 30 min