Flavonoids Syntheses. VI.1) Synthesis and Spectral Properties of 4-Arylcoumarins (Neoflavones)

Abstract

Eight neoflavones were synthesized for examination oT their spectral properties. In the mass spectra, 2’-oxygenated neoflavones showed characteristic fragments owing to dehydroxylation or demethoxylation. Other spectral data ultraviolet, proton and carbon-13 nuclear magnetic resonance, however, showed no specific features that could be used to characterize the structures. © 1987, The Pharmaceutical Society of Japan. All rights reserved.