Scheme 1From: Synthesis and fungicidal activity of pyrazole derivatives containing 1,2,3,4-tetrahydroquinolineSynthetic route of intermediates 3a–3n. Reagents and conditions: (a) CH3CH2ONa, CH3CH2OH, diethyl oxalate, room temperature (r.t.), 2 h; (b) glacial acetic acid, r.t., 0.5 h; substituted hydrazine, r.t., overnightBack to article page