反应详情

温度

150 °C

To a solution of 5-bromo-N-(4-methyl-3-nitrophenyl)pyrimidin-2-amine 27 (0.5 mmol) in 1,4-dioxane (2.0 mL) is added 2-(4-(difluoromethoxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 7 (0.5 mmol), Na2CO3 (1.5 mmol of a 3.0 M aq. solution) and Pd(PPh3)4 (0.025 mmol). The reaction is evacuated and backfilled with nitrogen twice then heated in the microwave oven at 150° C. for 10 min. The reaction mixture is diluted with water (10 mL) and extracted with DCM (2×50 mL). The organic layer is separated, dried over Na2SO4 and concentrated. Purification by preparative HPLC (ACN gradient 10-70%) affords 4-(difluoromethoxy)phenyl)-N-(4-methyl-3-nitrophenyl)pyrimidin-2-amine 28a. 1H NMR (400 MHz, d6-DMSO) δ 10.23 (s, 1H), 8.92 (s, 2H), 8.66 (d, J=2.4 Hz, 1H), 7.93 (dd, J=2.4, 8.4 Hz, 1H), 7.82 (d, J=8.4 Hz, 2H), 7.43 (d, J=8.4 Hz, 1H), 7.31 (t, J=74.0 Hz, 1H), 7.29 (d, J=8.4 Hz, 2H), 2.47 (s, 3H). MS (m/z) (M+1)+: 373.1.

1. customThe reaction is evacuated
2. additionThe reaction mixture is diluted with water (10 mL)
3. extractionextracted with DCM (2×50 mL)
4. customThe organic layer is separated
5. dry with materialdried over Na2SO4
6. concentrationconcentrated
7. customPurification by preparative HPLC (ACN gradient 10-70%)