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17 O NMR studies on ( E )‐3‐arylidenechromanone and ‐flavanone derivatives
Author(s) -
Tóth Gábor,
Simon András,
Lévai Albert,
Kählig Hanspeter,
Kalchhauser Hermann
Publication year - 2001
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.877
Subject(s) - chemistry , flavanone , substituent , steric effects , chemical shift , proton nmr , carbon 13 nmr , stereochemistry , computational chemistry , nuclear magnetic resonance spectroscopy , organic chemistry , flavonoid , antioxidant
17 O 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. 17 O NMR chemical shifts were correlated with Hammett σ p + values for 4′‐substituted derivatives. Copyright © 2001 John Wiley & Sons, Ltd.