Processes for the preparation of 1,1'-dinaphthyl-4,4',5,5',8,8'-hexacarboxylic acid derivatives
The invention relates to processes for the preparation of derivatives of the polynuclear, polybasic aromatic carboxylic acids, in particular to a process for the preparation of 1,1'-dinaphthyl-4,4',5,5',8,8'-hexacarboxylic acid derivatives of the general formula in which X repres...
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