反应详情

温度

0 °C

To a solution of 9-chloro-1-(6-methoxy-2-methylpyridin-3-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (2.20 g, 6.17 mmol) in tetrahydrofuran (28.0 mL) was added trimethyl(trifluoromethyl)silane (2.73 mL, 18.50 mmol) and tetrabutylammonium fluoride (1.0 M solution in tetrahydrofuran, 0.617 mL, 0.617 mmol) at 0° C. After 30 min, to the mixture was added 1N hydrochloric acid (9.0 mL) and the reaction mixture was stirred at 0° C. for 1 hr. The mixture was quenched with aqueous saturated sodium hydrogen carbonate and extracted with ethyl acetate (×3). The combined organic layer was washed with brine (×1), dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The resulting solid was washed with diisopropyl ether to give the title compound as a colorless solid (2.49 g, 5.82 mmol, 94%).

1. customThe mixture was quenched with aqueous saturated sodium hydrogen carbonate
2. extractionextracted with ethyl acetate (×3)
3. washThe combined organic layer was washed with brine (×1)
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. washThe resulting solid was washed with diisopropyl ether