Ammonium Chloride → HCID 178507522, compound

Participants

Reaction Steps

The 3-(2,6-dichlorophenyl)-5-(3-nitrophenyl) pyrazole prepared in Step 2 (57 mg) was dissolved in 50% aqueous ethanol and treated with iron powder (57 mg, 6 molar equivalents), and ammonium chloride (18.2 mg, 2 molar equivalents). The mixture was heated at 70–80° C. for 4 h. The reaction mixture was cooled to room temperature then filtered and the filtrate was concentrated to dryness under reduced pressure. The residue was dissolved in ethyl acetate and washed with water and brine. The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to give 3-(2,6-dichlorophenyl)-5-(3-aminophenyl)pyrazole as a white solid (27 mg). NMR (300 MHz, CDCl3): 7.40 (d, 2H), 7.25 (t, 1H), 7.20 (m, 1H), 7.11 (m, 2H), 6.68 ppm (m, 2H). LC-MS tr=5.66 min (Method Z) MH+=303–307

Provenance & Evidence