Choice of Catalysts.-Attempts were made to prepare the diphenyl oxide derivatives by the condensation of two phenols having other groups in meta position. While it was possible to prepare diphenyl oxide from phenol using aluminum chloride as catalyst, no condensation took place when the m-alkoxyphenols were used. When metallic potassium was used with m- methoxyphenol, and the resulting salt refluxed with m-methoxybromobenzene in the ...
