反应详情

6-Chloro-N4-(4-chlorophenyl)-pyrimidine-4,5-diamine I-(1A-1)a (6.6 g, 26 mmol) in pyridine (30 ml) was cooled to 0° C. and to it was added 4-chloro-2-fluorobenzoyl chloride (5 g, 26 mmol). The reaction was then allowed to warm to ambient temperature overnight. The heterogeneous reaction was diluted with ethanol (50 ml) and the resulting solid collected by filtration. The solids were slurried in toluene, which was then removed under reduced pressure to remove residual ethanol. The solid was slurried in diethyl ether and then collected by filtration to give I-(7A-91)a (8.3 g, 78%): +ACPI MS (M+1) 409.0; 1H NMR (400 MHz, CD3OD) δ 10.60 (s, 1H), 10.10 (s, 1H), 9.19 (s, 1H), 8.74 (t, J=8.1 Hz, 1H), 8.46–8.40 (m, 3H), 8.28 (dd, J=8.7, 2.1 Hz, 1H), 8.20 (d, J=8.7 Hz, 2H).

1. customThe heterogeneous reaction
2. filtrationthe resulting solid collected by filtration
3. customwhich was then removed under reduced pressure
4. customto remove residual ethanol
5. filtrationcollected by filtration
6. customto give I-(7A-91)a (8.3 g, 78%)