反应详情

trans-Dichlorobis(triphenylphosphine)palladium (II) (1.179 g, 1.680 mmol), 5-chloro-2-fluorophenylboronic acid (6.1 g, 35.3 mmol), 2-chloro-5-fluoromethylpyrimidin-4-amine (2.411 g, 16.80 mmol), 2M Na2CO3 (8.40 mL, 16.80 mmol) were combined in dioxane (79 mL) and refluxed for 1 hour. The reaction was cooled, concentrated and the solids were suspended in brine (50 mL) and then extracted with EtOAc (20 mL). The layers were separated, the organics were dried over Na2SO4, filtered and concentrated to give a residue which was passed through a silica plug (12 g) to give 2-(5-chloro-2-fluorophenyl)-5-methylpyrimidin-4-amine which was without further purification. 1H NMR (400 MHz, DMSO-d6) δ ppm 2.03 (3H, d, J=0.76 Hz) 6.85 (2H, br. s.) 7.31 (1H, dd, J=10.61, 8.84 Hz) 7.46-7.55 (1H, m) 7.88 (1H, dd, J=6.57, 3.03 Hz) 8.06 (1H, d, J=0.76 Hz). ESI-MS: m/z 238.1 (M+H).

1. temperaturerefluxed for 1 hour
2. temperatureThe reaction was cooled
3. concentrationconcentrated
4. extractionextracted with EtOAc (20 mL)
5. customThe layers were separated
6. dry with materialthe organics were dried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customto give a residue which