1H and13C NMR Spectroscopy of mono-, di-, tri- and tetrasubstituted xanthones

Abstract

The structural elucidation of 24 xanthones with different substitution patterns was performed by spectroscopic methods, namely 2D NMR techniques, such as correlation spectroscopy (COSY), nuclear Overhauser effect (NOE), heteronuclear correlation (HETCOR) and a 1D NMR technique, selective insensitive nuclei enhanced by polarization transfer (INEPT). © 1997 John Wiley & Sons, Ltd.