反应详情

Sodium ethoxide (0.7 mL (2.09 mmol), 21% in ethanol) and N-cyclopentyl guanidine hydrochloride (0.47 g, 2.88 mmol) were added sequentially to ethanol (30 mL). The resulting solution was stirred at room temperature for 30 minutes. 1-[5-chloro-2-(4-methoxyphenyl)pyrazolo[1,5-a]pyridin-3-yl]-2-propyn-1-one (0.5 g9, 1.61 mmol) was added, and the suspension was stirred at room temperature for 2 days. The reaction was quenched by the addition of water. The aqueous phase was extracted by ethyl acetate. The organics were combined, washed with brine and dried over magnesium sulfate. Filtration and concentration gave a solid. This solid was recrystallized from methanol to give 4-[5-chloro-2-(4-methoxyphenyl)pyrazolo[1,5-a]pyridin-3-yl]-N-cyclopentyl-2-pyrimidinamine (0.45 g, 66%) as a pale yellow solid. 1H NMR (CDCl3): δ 8.59 (broad s, 1H), 8.42 (d, 1H), 8.05 (d, 1H), 7.59 (d, 2H), 7.03 (d, 2H), 6.91 (dd, 1H), 6.39 (d, 1H), 5.34 (broad s, 1H), 4.42 (m, 1H), 3.92 (s, 3H), 2.17 (m, 2H), 1.86–1.60 (m, 6H); MS m/z 420 (M+1).

1. stirringthe suspension was stirred at room temperature for 2 days
2. customThe reaction was quenched by the addition of water
3. extractionThe aqueous phase was extracted by ethyl acetate
4. washwashed with brine
5. dry with materialdried over magnesium sulfate
6. filtrationFiltration and concentration
7. customgave a solid
8. customThis solid was recrystallized from methanol