α,ω-双-(对-氨基苯氧基)-戊烷和庚烷系由对-硝基苯酚与相当的α,ω-二溴烷缩合,再行还原而得;而α,ω-双-(对-甲氨基苯氧基)-戊烷和庚烷的制备,则系以对-(N-对-甲苯磺酰-N-甲氨基)-苯酚或对-(N-乙酰-N-甲氨基)-苯酚代替对-硝基苯酚同法进行缩合,继以水解制得。 α, ω-bis- (p-aminophenoxy) -pentane and heptane are obtained by the condensation of p-nitrophenol with the corresponding α, ω-dibromoalkane and subsequent reduction. The preparation of bis- (p-methylaminophenoxy) -pentane and heptane is carried out with p- (N-p-toluenesulfonyl-N-methylamino) -phenol or p- - methylamino) -phenol instead of p-nitrophenol condensation with the law, followed by hydrolysis obtained.