反应详情

To a solution of 9-chloro-1-(6-methoxy-2-methylpyridin-3-yl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (213.6 mg, 0.599 mmol) in tetrahydrofuran (3.0 mL) was added cyclopropylmagnesium bromide (1.0 M solution in tetrahydrofuran, 898 μL, 0.898 mmol) at 0° C. The reaction mixture was stirred at room temperature for 1 hr. The starting material wasn't consumed completely. To the mixture was added cyclopropylmagnesium bromide (1.0 M solution in tetrahydrofuran, 449 μL, 0.449 mmol) at 0° C. The reaction mixture was stirred at room temperature for 1 hr. The mixture was quenched with aqueous saturated ammonium chloride and extracted with ethyl acetate (×3). The combined organic layer was washed with brine, 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 (231.2 mg, 0.580 mmol, 97%).

1. customThe starting material wasn't consumed completely
2. stirringThe reaction mixture was stirred at room temperature for 1 hr
3. customThe mixture was quenched with aqueous saturated ammonium chloride
4. extractionextracted with ethyl acetate (×3)
5. washThe combined organic layer was washed with brine
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. washThe resulting solid was washed with diisopropyl ether