反应详情

温度

120 °C

Palladium (II) acetate (2.79 mg, 0.012 mmol) was added to a stirred suspension of 2-phenoxymethyl-6,7-dihydro-5H-pyrazolo[1,5-a]pyrazin-4-one (100 mg, 0.41 mmol), cesium carbonate (0.18 g, 0.57 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (17 mg, 0.037 mmol) and 2-chloro-5-fluoro-4-methoxypyrimidine (0.2 g, 1.23 mmol) in a sealed tube and under nitrogen. The reaction mixture was stirred at 120° C. for 16 hours. The solvent was evaporated in vacuo and the crude product was purified by flash column chromatography (silica; AcOEt in DCM 0/100 to 100/0). The desired fractions were collected and the solvents evaporated in vacuo to yield 5-(5-fluoro-4-methoxy-pyrimidin-2-yl)-2-phenoxymethyl-6,7-dihydro-5H-pyrazolo[1,5-a]pyrazin-4-one (50 mg, 33% yield) as a white solid. 1H NMR (500 MHz, CDCl3) δ ppm 4.10 (s, 3H), 4.41-4.57 (m, 4H), 5.12 (s, 2H), 6.93-7.04 (m, 3H), 7.09 (s, 1H), 7.27-7.34 (m, 2H), 8.28 (d, J=2.3 Hz, 1H).

1. customThe solvent was evaporated in vacuo
2. customthe crude product was purified by flash column chromatography (silica; AcOEt in DCM 0/100 to 100/0)
3. customThe desired fractions were collected
4. customthe solvents evaporated in vacuo