Cas: 2657-87-6 | Nakagawa, Takafumi et al. made new progress in 2014

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Reference of 3-(4-Aminophenoxy)anilineEthers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.

Reference of 3-(4-Aminophenoxy)aniline《Synthesis and characterization of novel aromatic polyimides from Z-type sexiphenyltetracarboxylic dianhydride and aromatic diamines》 was published in 2014. The authors were Nakagawa, Takafumi;Morikawa, Atsushi, and the article was included in《Polymer Journal (Tokyo, Japan)》. The author mentioned the following in the article:

A Z-type sexiphenyltetracarboxylic dianhydride, 3,3””’,4,4””’-1,1′:2′,1”:4”,1”’:4”’,1””:2””,1””’-sexiphenyltetracarboxylic dianhydride (1), was synthesized in seven steps from di-Et 4-bromophthalate. New aromatic polyimides (PI1x) containing the Z-type sexiphenyl unit were synthesized from 1 and various aromatic diamines (x) by both conventional two- and one-step procedures. The inherent viscosities of PI1x produced by the one-step procedure were 0.23-1.21, which is much higher than those of the polyimides produced by the two-step procedure. The polyimides PI1x were characterized by x-ray diffraction, differential scanning calorimetry, thermogravimetry and dynamic mech. anal. (DMA). The structure-property relationships of the polyimides PI1x were compared with those of the polyimides (PI2x) previously prepared from rigid 3,3””’, 4,4””’-p-sexiphenyltetracarboxylic dianhydride (2), which is an isomer of 1. The glass transition (Tg) temperatures were much higher (270-345 °C) than those of the corresponding PI2x, and the decrease in the storage modulus at Tg was larger than that of the corresponding PI2x. The polyimides PI1x showed lower dielec. constants (ε) and were soluble in polar organic solvents at room or elevated temperature in contrast with PI2x. The Z-type structure significantly influences the properties of polyimides containing sexiphenylene units. To complete the study, the researchers used 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) .

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Reference of 3-(4-Aminophenoxy)anilineEthers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem