反应详情

The xanthydrols are either known to the art or are prepared by the following procedure. A 2-halobenzoic acid is reacted with a phenol preferably in the presence of a base such as potassium carbonate and in the presence of cuprous iodide and copper bronze. The resulting 2-phenoxybenzoic acid is cyclized by treating with acid for example polyphosphoric acid. The resulting xanthone is reduced, for example using sodium amalgam in ethanol, to give the xanthydrol.

1. customare prepared by the following procedure