反应详情

Sodium hydride (0.3 g, 12.5 mmol) suspended in DMF (5 mL) at 0° C. was treated with 4-nitro-1H-indazole (1.33 g, 10 mmol). After stirring at room temperature for 1 hour, the mixture was treated with methylchloroformate (0.9 mL). After stirring at room temperature for 3 hours, the mixture was carefully treated with water and filtered to provide the title compound (1.2 g). 1H NMR (300 MHz, DMSO-d6) δ 4.1 9 (s, 3H), 7.9 (t, 1H), 8.38 (d, 1H), 8.62 (d, 1H), 8.85 (s, 1H).

1. stirringAfter stirring at room temperature for 3 hours
2. filtrationfiltered