反应详情

温度

108 °C

In a microwave reaction tube were combined 4,6-dichloropyrimidine (480 mg, 3.22 mmol), 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-trityl-1H-pyrazole (1.28 g, 2.93 mmol; JP 2005232071), bis(triphenylphosphine)-palladium(II) chloride (82 mg, 0.117 mmol), sodium carbonate (776 mg, 7.32 mmol), followed by the solvents 2-propanol (9.0 mL) and water (3.0 mL). The tube was sealed, and the reaction was heated to 108° C. for 30 minutes in the microwave reactor. After cooling to room temperature, the mixture was partitioned between ethyl acetate (2×100 mL) and water (200 mL). The combined organic extracts were washed with brine, dried (sodium sulfate) and concentrated under reduced pressure, and the resulting material was purified by silica gel flash column chromatography to afford the titled compound: 1H NMR (300 MHz, methanol-D4) δ ppm 7.11-7.22 (m, 6H), 7.28-7.41 (m, 9H), 7.81-7.83 (m, 1H), 8.23-8.26 (m, 1H), 8.30 (s, 1H), 8.75-8.78 (m, 1H). MS (DCI/NH3) m/z=423 (M+H)+.

1. customIn a microwave reaction tube
2. customThe tube was sealed
3. temperatureAfter cooling to room temperature
4. customthe mixture was partitioned between ethyl acetate (2×100 mL) and water (200 mL)
5. washThe combined organic extracts were washed with brine
6. dry with materialdried (sodium sulfate)
7. concentrationconcentrated under reduced pressure
8. customthe resulting material was purified by silica gel flash column chromatography