Ammonium Chloride → HCID 11401973, compound

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Reaction Steps

4-Nitro-2-(2-pyrrolidin-1-yl-ethyl)-2H-indazole (1.20 g, 4.62 mmol), iron powder (2.60 g, 46.6 mmol) and ammonium chloride (0.125 g, 2.34 mmol) was suspended in a 4:1 ethanol/H2O solution. The mixture was heated to reflux for 3 hours, cooled to room temperature and the solvent removed in vacuo. The residue was stirred in triethylamine/ethyl acetate (1/4, 30 mL) for 15 minutes and filtered through a plug of silica gel. After rinsing with triethylamine/ethyl acetate (1/4), the filtrate was concentrated to provide the title product. 1H NMR (300 MHz, DMSO-d6) δ ppm 1.66 (m, 4H), 2.50 (m, 4H), 2.96 (t, 2H, J=6.44), 4.44 (t, 2H, J=6.44), 5.51 (s, 2H), 6.70 (m, 1H), 6.88 (d, 1H, J=8.48), 6.91 (m, 1H), 8.28 (s, 1H); MS (DCI/NH3) m/z 231 [M+H]+.

Provenance & Evidence