Hydrazine → HCID 59375012, compound

Participants

Reaction Conditions

Reaction Steps

Step 3 A yellow solution of N-(3-bromo-2-methylphenyl)-2-fluorobenzothioamide (500 mg, 1.542 mmol) in DMSO (5 mL) was treated with anhydrous hydrazine (0.484 mL, 15.42 mmol) and heated at 150° C. After 2 h 20 min the solution was cooled to rt, diluted with NaHCO3 (aq) and extracted twice with EtOAc. The combined organic phases were washed twice with water and once with brine, dried and concentrated. The residue was purified by column chromatography (eluting with a gradient from 85:15 to 50:50 hexane-EtOAc) to provide N-(3-bromo-2-methylphenyl)-1H-indazol-3-amine as a tan waxy solid (162 mg, 35%). 1H NMR (400 MHz, chloroform-d) δ 9.38 (1 H, br. s.), 7.49 (1 H, d, J=8.1 Hz), 7.45 (1 H, d, J=7.9 Hz), 7.40 (2 H, d, J=3.5 Hz), 7.19 (1 H, dd, J=7.9, 0.9 Hz), 7.10 (1 H, dt, J=8.1, 4.0 Hz), 6.98 (1 H, t, J=8.1 Hz), 6.10 (1 H, s), 2.49 (3 H, s). Mass spectrum m/z 302, 304 (M+H)+.

Provenance & Evidence