反应详情

温度

60 °C

To a solution of N-butyl-4-[7-chloro-2-(4-fluorophenyl)pyrazolo[1,5-a]pyridin-3-yl]-2-pyrimidinamine (80 mg, 0.20 mmol) in tetrahydrofuran (1 mL) was added dimethylzinc (304 μL, 2.0 M in toluene, 0.60 mmol) and tetrakis(triphenyl-phosphine)palladium(0) (23 mg, 0.02 mmol). The reaction mixture was heated at 60° C. for 16 hours. The reaction mixture was cooled, then quenched with ice water. The resultant mixture was extracted with ethyl acetate. The organic layer was washed with water and brine, then dried over magnesium sulfate. Filtration and concentration, followed by flash chromatography (3:1 hexanes:ethyl acetate) provided N-butyl-4-[2-(4-fluorophenyl)-7-methylpyrazolo[1,5-a]pyridin-3-yl]-2-pyrimidinamine (24 mg, 32%) as a yellow solid. Rf 0.33 (2:1 hexanes:ethyl acetate); 1H NMR (400 MHz, CDCl3) δ 8.32 (d, 1H), 8.04 (d, 1H), 7.64 (m, 2H), 7.27 (m, 1H), 7.13 (t, 2H), 6.77 (d, 1H), 6.31 (d, 1H), 5.17 (br, 1H), 3.48 (m, 2H), 2.80 (s, 3H), 1.65 (m, 2H), 1.45 (m, 2H), 0.97 (t, 3H); MS m/z 376 (M+1).

1. temperatureThe reaction mixture was cooled
2. customquenched with ice water
3. extractionThe resultant mixture was extracted with ethyl acetate
4. washThe organic layer was washed with water and brine
5. dry with materialdried over magnesium sulfate
6. filtrationFiltration and concentration