Iodine → HCID 178526495, compound

Participants

Reaction Steps

To a solution of 5-nitro-1H-indazole (10.0 g, 62.3 mmol) in DMF (120 ml) was added potassium hydroxide (12.9 g, 230.4 mmol) followed by iodine (31.1 g, 122.6 mmol) portion wise over 5 minutes. The resulting mixture was stirred at room temperature for 14 hours and then poured onto 10% sodium metabisulfite (100 ml) and extracted into ethyl acetate (3×50 ml). The combined organic extracts were washed with brine (50 ml), dried (Na2SO4) and concentrated in vacuo to afford the title compounds as a pale orange solid (17.5 g). 1H NMR (400 MHz, DMSO-d6) δ 7.77 (1H, d), 8.26 (1H, d), 8.34 (1H, s), 14.15 (1H, s). MS (ES+) m/e=290.

Provenance & Evidence