Hydrazine hydrate (1:1) → HCID 67959966, compound

Participants

Reaction Steps

To a stirred solution of methyl 5-(6-isopropoxypyrazin-2-yl)-1H-indole-3-carboxylate (10 g, 30 mmol) in EtOH (50 mL) was added hydrazine hydrate (30 mL) and the reaction was heated at reflux for 48 h. The reaction was cooled to RT and a white precipitate was formed. The suspension was filtered and dried to afford 5-(6-isopropoxypyrazin-2-yl)-1H-indole-3-carbohydrazide (9.0 g, 90.9%) as a white solid. MS (ESI, pos. ion) m/z: 312 (M+1); 1H-NMR (DMSO-d6) δ ppm; 11.71 (s, 1H), 9.2 (s, 1H), 8.8 (d, J=1.6 Hz, 1H), 8.71 (s, 1H), 8.1 (s, 1H), 8.0 (s, 1H), 7.90 (dd, J=8.4, 1.6 Hz, 1H), 7.55 (d, J=8.4 Hz, 1H), 5.4 (m, 1H), 4.35 (d, J=2 Hz, 1H), 1.4 (d, J=6.0 Hz, 6H).

Provenance & Evidence