1H and 13C NMR spectral assignments of novel chromenylchalcones |
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| Authors: | Hyuk Yoon Seunghyun Ahn Doseok Hwang Geunhyeong Jo Dong Woon Kim Sang Ho Kim Dongsoo Koh Yoongho Lim |
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| Affiliation: | 1. Division of Bioscience and Biotechnology, BMIC, Konkuk University, , Seoul, 143‐701 South Korea;2. Department of Applied Chemistry, Dongduk Women's University, , Seoul, 136‐714 South Korea;3. Swine science division, National Institute of Animal Science, RDA, , Cheonan, 330‐801 South Korea |
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| Abstract: | Several types of chalcones containing 2H‐chromen group were synthesized. Claisen–Schmidt condensation of 2H‐chromen‐3‐carbaldehydes (I) with methoxy substituted acetophenones afforded (E)‐3‐(2H‐chromen‐3‐yl)‐1‐(methoxyphenyl)prop‐2‐en‐1‐ones (chromenylchalcones, 1–7). Other types of chromenylchalcone, (E)‐1‐(6‐methoxy‐2H‐chromen‐3‐yl)‐3‐(methoxyphenyl)prop‐2‐en‐1‐ones (8–13) were also obtained between reaction of methoxy substituted benzaldehydes and 1‐(6‐methoxy‐2H‐chromen‐3‐yl)ethanone (II). Dichromenylchalcones (14–16) were also synthesized through the same reaction between aldehydes (I) and ketone (II). Their complete 1H‐NMR and 13C‐NMR assignments are reported here and more polysubstituted chromenylchalcones synthesized or isolated from the natural sources in the future can be identified on the basis of the NMR data reported here. Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | NMR 1 H NMR 13C NMR 2D NMR flavonoid chalcone |
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