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  • Yellow crystal (80.7% yield); m.p.: 132-134 °C (lit. [18] 135-136 °C); UV-Vis (MeOH) λ: 341-342 nm; IR (KBr, cm): 3448 (O-H), 2957-3132 (Ar C-H stetch), 1632 (C=O), 1556-1585 (C=C-C=O), 1338-1435 (C=C), 1110-1219 (C-O), 745-748 (C-Cl); H-NMR (600 MHz, CDCl) δ: 14.24 (s, 1H, OH, C-2′), 8.12 (d, 1H, H-β, J = 15.60 Hz), 7.85 (d, 1H, H-α, J = 15.60 Hz), 7.67 (m, 1H, H-6), 7.40 (m, 1H, H-3), 7.28 (m, 2H, H-4 and H-5), 6.08 (d, 1H, H-3′, J = 2.34 Hz), 5.93 (d, 1H, H-5′, J = 2.40 Hz), 3.88 (s, 3H, OCH, C-6′), 3.81 (s, 3H, OCH, C-4′); EI-MS: m/z = 318 (30), 301 (4), 283 (70), 267 (7), 207 (100), 181 (32), 165 (6), 152 (6), 137 (12), 101 (12), 69 (7); (Molecular formula CHClO). (E)-3-(4-Chlorophenyl)-1-(2′-hydroxy-4′,6′-dimethoxyphenyl)prop-2-en-1-one (17).
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