高纯度3,4′-二氨基二苯醚的合成

THE SYNTHESIS OF THE HIGH PURITY 3,4'-DIAMINODIPHENYL ETHER

本文以对氯硝基苯和间硝基苯酚或间氨基苯酚为原料,合成3,4°-二硝基二苯醚和3-氨基-4′-硝基二苯醚。通过催化氢化将它们转变成3,4′-二氨基二苯醚,并进行一系列条件试验,以得最佳氢化条件,又经元素分析、高效液相色谱、紫外吸收光谱、红外吸收光谱、核磁共振和质谱等测定,证实了产物的结构及其纯度,产品完全符合共缩聚的要求.

The compound, 3,4'—diaminodiphenyl ether, was synthesized by catalytic hydrogenation from 3,4'—dinitrodiphenyl ether and 3-amino—4'—nitrodiphenyl ether which were prepared respectively from p-chloronitrobenzene and m—nitrophenol or m-aminophenol by etherification. The optimal conditions of the catalytic hydrogenation were found by a series of experiments under different conditions. The structure, as well as the purity of the product, was identified by elementary analysis, HPLC, UV, IR, NMR and MS methods. The product completely satisfies the requirements of the copolycondensation.