4-Nitroindazole → NoName_3327

Participants

Reaction Steps

4-Nitro-1H-indazole (1.63 g, 10 mmol) in ethanol (100 mL) was treated with BiCl3 (3.46 g, 11 mmol) followed by a portionwise addition of NaBH4 The reaction mixture was stirred at ambient temperature for 20 minutes and filtered through Celite. The filtrate was evaporated under reduced pressure and the residue was partitioned between ethyl acetate/dilute NaHCO3 solution. The organic layer was dried over MgSO4, filtered, and the filtrate concentrated under reduced pressure to provide the title compound as a tan solid (1.0 g). 1H NMR (300 MHz, DMSO-d6) δ 5.64 (s, 2H), 6.1 (d, 1H), 6.6 (d, 1H), 6.98 (t, 1H), 8.03 (s, 1H), 12.6 (s, 1H).

Provenance & Evidence