反应详情

NaH (1.47 g, 0.037 mol) was added to THF (25 mL) at 0° C. Separately, 6-nitro-1H-indazole (5.0 g, 0.031 mol) was dissolved in THF (25 mL) and the solution was slowly added to the solution prepared. Iodomethane (2.48 mL, 0.040 mol) was slowly added to the mixed solution at the same temperature, followed by stirring for 2 hours. The reaction solution was concentrated under reduced pressure, and added with water and ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The concentrated compound (1-methyl added (Rf=0.8):2-methyl added (Rf=0.3)=1:1) was purified using silica gel chromatography (ethyl acetate:hexane=1:1 (v/v)) to obtain the title compound (Rf=0.8, 2.22 g, 41%).

1. additionthe solution was slowly added to the solution
2. customprepared
3. concentrationThe reaction solution was concentrated under reduced pressure
4. additionadded with water and ethyl acetate
5. washThe organic layer was washed with a saturated aqueous solution of sodium chloride
6. dry with materialdried over anhydrous sodium sulfate
7. concentrationconcentrated under reduced pressure
8. additionThe concentrated compound (1-methyl added (Rf=0.8):2-methyl added (Rf=0.3)=1:1)
9. customwas purified