Hydrazine hydrate (1:1) → 3-(7-Chloro-6-methoxy-4-oxo-3,4-dihydrophthalazin-1-yl)benzonitrile

Participants

Reaction Steps

A solution of 4-chloro-2-(3-cyanobenzoyl)-5-methoxybenzoic acid (3.0 g, 9.50 mmol) in hydrazine hydrate (0.6 mL 11.4 mmol) and EtOH (40 mL) was heated at 80° C. for 2 h. The reaction mixture was diluted with water (100 mL), and the precipitate was filtered and dried to obtain 3-(7-chloro-6-methoxy-4-oxo-3,4-dihydrophthalazin-1-yl)benzonitrile (0.6 g, 17%) (312.4 [M+H]) 1H NMR: (400 MHz, DMSO) δ: 3.96 (s, 3H), 7.64 (s, 1H), 7.79-7.75 (t, 1H), 7.87 (s, 1H), 7.96-7.94 (d, J=8, 1H), 8.04-8.02 (d, J=8, 1H), 8.09 (s, 1H), 13.03 (s, 1H).

Provenance & Evidence