反应详情

温度

-78 °C

To a solution of N-cyclopentyl-3-[2-(cyclopentylamino)-4-pyrimidinyl]-2-(4-fluorophenyl)pyrazolo[1,5-a]pyridin-5-amine (120 mg, 0.26 mmol) in tetrahydrofuran (5 mL) at −78 ° C. was added n-butyllithium (0.8 mL, 1.3 mmol of 1.6 M solution in hexanes). The resulting reaction was stirred at −78° C. for 10 minutes, then carbon tetrachloride (1 mL) was added. The reaction mixture was allowed to warm to room temperature and then quenched by the addition of water. The phase were separated and the organic phase dried over magnesium sulfate, filtered and concentrated. The resulting residue was purified by flash chromatography (1:1 hexanes-ethyl acetate) to give 7-chloro-N-cyclopentyl-3-[2-(cyclopentylamino)pyrimidin-4-yl]-2-(4-fluorophenyl)pyrazolo[1,5-a]pyridin-5-amine (12 mg) as a foam. 1H-NMR (CDCl3): δ 7.97 (d, 1H), 7.62 (q, 2H), 7.44 (d, 1H), 7.15 (t, 2H), 6.48 (d, 1H), 6.22 (d, 1H), 5.30 (broad s, 1H), 4.44 (m, 1H), 4.18 (m, 1H), 3.94 (m, 1H), 1.4–2.1 (16H);19F-NMR (CDCl3): δ −113.24; MS m/z 492 (M+1).

1. customThe resulting reaction
2. temperatureto warm to room temperature
3. customquenched by the addition of water
4. customThe phase were separated
5. dry with materialthe organic phase dried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customThe resulting residue was purified by flash chromatography (1:1 hexanes-ethyl acetate)