What is the use and preparation of 3,4'-Oxydianiline?

3,4'-Oxydianiline is typically used for synthesizing polyimides with multi-functionalities. The preparation of 3,4'-Oxydianiline is as follows:The hydrogenation reaction was carried out in a 100 mL reaction flask equipped with an FB generator without additional stirring. 3-Amino-4'-nitrodiphenyl ether (10 mmol) was dissolved in ethyl acetate (80 mL) and subsequently heated to 30 °C. H2-FB was introduced into the reaction system in the presence of palladium alumina spheres (0.5% Pd, 2-4 mm, 0.3 mmol, 3 mol%) using a FB generator (MA3-FS) at a flow rate of 5 mL/min. Upon completion of the hydrogenation reaction, ethyl acetate was removed by vacuum evaporation to obtain high purity 3,4'-diaminodiphenyl ether.

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