Acetic Anhydride → 1-(6-nitroindazol-1-yl)ethanone

Participants

Reaction Steps

6-nitroindazole (1 g, 6.13 mmol) was dissolved in dimethylformamide (15 mL), and added with triethylamine (1.7 mL, 12.2 mmol), Ac2O (0.69 mL, 7.4 mmol) and 18-Crown-6 (0.38 g, 1.23 mmol). The reaction solution was stirred for about 4 hours at room temperature. The reaction mixture was added with distilled water, and further stirred for about 1 hour. The resulting solid was filtered under reduced pressure, and washed with distilled water. The filtered solid was dried with warm wind in an oven (40° C.) for 3 hours or more to obtain the title compound (0.9 g, 75%).

Provenance & Evidence