The 1,4-benzenediol derivatives are found not only in the naturally occurring compounds 1 but also in the industrial products 2 . Some of the compounds are utilized extensively as the anti-oxidant chemicals 3 , photo-industry materials 4 , or polymer materials 5 owing to their own chemical properties. The variation of the substituents on the aromatic ring gives desired properties to the compounds themselves and their derivatives such as liquid-crystalline polyesters ...
