4-Hydroxybenzoic acid hydrazide → 4-Hydroxy-benzoic acid (5-ethyl-furan-2-ylmethylene)-hydrazide

関与物質

反応手順

To a solution of 4-hydroxy-benzoic acid hydrazide (0.3 g, 0.002 mol) and 5-ethyl-2-furaldehyde (0.25 g, 0.002 mol) in abs. EtOH (10 mL), was added 1 drop of acetic acid. The reaction mixture was refluxed for 5 hours. The reaction mixture was cooling to room temperature and concentrated to remove solvent. The resulting residue was solidified by pet ether to give red solid 0.44 g, in 85% yield, mp: 60.5° C. 1H NMR (DMSO-d6) δ 11.53 (s, 1H), 10.16 (s, 1H), 8.24 (s, 1H), 7.79 (d, 2H), 6.87 (d, 2H), 6.81 (s, 1H), 2.71 (q, 2H), 1.24 (t, 3H). 13C NMR (DMSO-d6) δ 164.5, 162.1, 161.2, 149.8, 138.5, 131.5, 125.7, 116.9, 116.7, 108.9, 22.8, 13.8. Anal. Calcd for C14H14N2O3: C, 65.11; H, 5.46; N, 10.85. Found: C, 65.00; H, 5.36; N, 10.55.

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