Generation of xanthones and benzoxanthones from o-aryloxybenzaldehydes by use of copper(II) halides
Abstract
The reaction of copper(II) halides with o-aryloxybenzaldehydes to give xanthones is shown to be a general one. 2-(6-Methoxy-2-naphthyloxy)benzaldehyde undergoes concomitant nuclear bromination to give 4-bromo-3-methoxybenzo[a]xanthen-12-one.