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17O NMR studies on (E)-3-arylidenechromanone and -flavanone derivatives |
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| Authors: | Gábor Tóth András Simon Albert Lévai Hanspeter Kählig Hermann Kalchhauser |
| Affiliation: | 1. Technical Analytical Research Group of the Hungarian Academy of Sciences, Institute for General and Analytical Chemistry of the Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary;2. Department of Organic Chemistry, Debrecen University, P.O.Box 20, H-4010 Debrecen, Hungary;3. Universität Wien, Institut für Organische Chemie, Währinger Str. 38, A-1090 Vienna, Austria |
| Abstract: | 17O NMR data for some 3-arylidenechromanones and -flavanones are discussed in terms of mesomeric and steric substituent interactions. The transmission of long-range substituent effects was studied. 17O NMR chemical shifts were correlated with Hammett σp+ values for 4′-substituted derivatives. Copyright © 2001 John Wiley & Sons, Ltd. |
| Keywords: | NMR 13C NMR 17O NMR (E)-3-arylidenechromanones (E)-3-arylideneflavanones substituent effects Hammett σp+ |