Spectres R.M.N.- 13C D'Hydroxy-5 Isoflavones et de Diméthyl-2,2 Phénylacetyl-6 Chromènes

✍ Scribed by C. Vilain; J. Jadot

• Book ID: 101760040
• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 291 KB
• Volume: 88
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.19790880502

✦ Synopsis

Abstract

^13^C NMR assignments previously given for A‐nuclei (C‐5, 6, 7, 8, 9, 10) of 5‐hydroxy‐isoflavones (Ie, IIe, IIIb) have been reconsidered on the basis of the proton‐coupled spectrum of 5‐hydroxy‐7, 4′‐dimethoxyisoflavone (Ie) (cf: Bull. Soc. Chim. Belg., 76 n°6/473, 1977).

Furthermore, in order to generalize the method employed to predict resonances of the aromatic carbons of the 2,2‐dimethylchromene ring, we have recorded and fully analysed the spectra of the model compound (IV) and of the 2,2‐dimethylphenylacetyl‐6‐chromenes (V) and (VI).