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  • Orange crystal (82.8% yield); m.p.: 158-159 °C (lit. [59] 151-153 °C); UV-Vis (MeOH): λ: 386 nm; IR (KBr, cm): 3464 (O-H), 2941-3010 (Ar C-H stretch), 1618 (C=O), 1414-1545 (C=C), 1122-1217 (C-O); H-NMR (600 MHz, CDCl) δ; 14.76 (s, 1H, OH, C-2′), 8.32 (d, 1H, H-β, J = 15.78 Hz), 8.25 (d, 1H, H-α, J = 15.78 Hz), 6.13 (s, 2H, H-3 and H-5), 6.09 (d, 1H, H-3′, J = 2.40 Hz), 5.94 (d, 1H, H-5′, J = 2.40 Hz), 3.90 (s, 3H, OCH, C-6 and C-6′), 3.89 (s, 3H, OCH, C-2), 3.85 (s, 3H, OCH, C-4′), 3.82 (s, 3H, OCH, C-4); EI-MS: m/z = 374 (2), 344 (44), 329 (8), 313 (100), 281 (10), 207 (50), 181 (25), 180 (54), 164 (44), 152 (21), 149 (37), 137 (37), 121 (33), 105 (12), 91 (26), 77 (23), 69 (15); (Molecular formula CHO). (E)-3-(2,5-Dimethoxyphenyl)-1-(2′-hydroxy-4′,6′-dimethoxyphenyl)prop-2-en-1-one (8).
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