abstract |
Oxidiphthalic acid esters of the formula (CF DRAWING IN BOPI) where Z is H or an alkyl group, and x is a halo radical, X 'is H or a halo radical, or X and X', together represent an atom of oxygen, are prepared by the esterification reaction of the corresponding halooxydiphthalic anhydride or dioxydiphthalic anhydride with an alkanol. |