Triethylamine → HCID 67298345, Verbindung

To a solution of 6-methoxynicotinic acid (100 mg, 0.65 mmol) in SOCK, (2 mL) was added DMF (1 drop). The mixture was stirred at 60° C. for 20 min. The volatiles were removed in vacuo to give 6-methoxynicotinoyl chloride, which was used for the next step directly. To a suspension of N4-(3-(difluoromethoxy)phenyl)-2-(pyrazin-2-yl)quinazoline-4,6-diamine (130 mg, 0.34 mmol, 0.5 eq.) in THF (5 mL) and Et3N (101 mg, 1 mmol, 3.0 eq) was added 6-methoxynicotinoyl chloride in anhydrous THF (5 mL) dropwise. The resulting mixture was stirred at room temperature for 18 h. The volatiles were removed in vacuo. The residue was washed with MeOH and re-crystallized from THF/MeOH twice, and purified by reverse phase chromatography PREP-HPLC (A=NH4HCO3—H2O, 10 mmol/L, B=MeOH) to afford 33 mg of N-(4-(3-(difluoromethoxy)phenylamino)-2-(pyrazin-2-yl)quinazolin-6-yl)-6-methoxynicotinamide as a pale yellow solid (18.8%). LCMS m/z=516.1 (M+1), 258.6 (M/2+1) (Method A) (retention time=1.57 min), 1H-NMR (400 MHz, DMSO-(d6): δ 10.71 (s, 1H), 10.18 (s, 1H), 9.57 (d, J=1.6 Hz, 1H), 9.01 (d, J=1.6 Hz, 1H), 8.91 (d, J=2.4 Hz, 1H), 8.81 (t, J=2.0 Hz, 1H), 8.76 (d, J=2.4 Hz, 1H), 8.34 (dd, J=8.8, 2.8 Hz, 1H), 8.23 (s, 1H), 8.08 (dd, J=8.8, 2.0 Hz, 1H), 8.00 (d, J=9.2 Hz, 1H), 7.90 (d, J=9.2 Hz, 1H), 7.46-7.50 (m, 1H), 7.32 (t, J=74.4 Hz 1H), 7.02 (d, J=8.8 Hz, 1H), 6.95 (dd, J=8.0, 2.0 Hz, 1H), 3.97 (s, 3H).