Method of making coupled 4,6-dibenzoylresorcinols

摘要

An improved method of making methylene-bridged 4,6-dibenzoylresorcinol dimers in a single step in high yield quantities is provided. The method heats a 4,6-dibenzoylresorcinol (DBR) with a para-aldehyde or an aromatic aldehyde in a carboxylic acid solvent in the presence of a strong acid catalyst.