反应详情

A mixture of ethyl 2-(4-aminophenyl)acetate (8 mmol), 2-chloro-5-(4-(difluoromethoxy)phenyl)pyrimidine 30 (4 mmol), and p-TSA (2 mmol) in 1,4-dioxane (4 mL) are heated at reflux for 4 h. The mixture is poured onto 1 N HCl. The solid is filtered, washed with 1 N HCl and dried to afford ethyl 2-(4-(5-(4-(difluoromethoxy)phenyl)pyrimidin-2-ylamino)phenyl)acetate 31 as a yellow solid. 1H NMR (400 MHz, CDCl3) δ 8.57 (s, 2H), 7.92 (s, 1H), 7.54 (d, J=8.5 Hz, 2H), 7.43 (d, J=8.6 Hz, 2H), 7.23 (d, J=8.6 Hz, 2H), 7.18 (d, J=9.1 Hz, 2H), 6.49 (t, J=73.5 Hz, 1H), 4.09 (q, J=7.1 Hz, 2H), 3.54 (s, 2H), 1.19 (t, J=7.1 Hz, 3H). MS (m/z) (M+1)+: 400.1.

1. temperatureare heated
2. temperatureat reflux for 4 h
3. filtrationThe solid is filtered
4. washwashed with 1 N HCl
5. customdried