反应详情

温度

19 °C

To a solution of 3-amino-6-chloropyridazine (11.14 g, 86.0 mmol) in NMP (279 mL) at 19° C. was added phenylacetyl chloride (18.2 mL, 137.6 mmol) dropwise over 5 minutes with the internal temperature of the solution maintained Ti≦28° C. The resulting mixture was stirred at 19° C. for 90 minutes and poured into ice water (557 mL). The white precipitate was collected by suction filtration, rinsed with water (2×110 mL) and diethyl ether (110 mL). The product was dried overnight under high vacuum to afford N-(6-chloropyridazin-3-yl)-2-phenylacetamide (xxx, 18.8 g). 1H NMR (300 MHz, DMSO-d6) δ 11.57 (s, 1H), 8.40 (d, J=9.636 Hz, 1H), 7.90 (d, J=9.516 Hz, 1H), 7.36 (m, 5H) 3.82 (s, 2H)

1. temperaturemaintained Ti
2. custom≦28° C
3. filtrationThe white precipitate was collected by suction filtration
4. washrinsed with water (2×110 mL) and diethyl ether (110 mL)
5. customThe product was dried overnight under high vacuum