A novel and more reliable synthetic route to 2, 5-difluoroterephthalic acid was developed. A series of new poly (hydroxyether terephthalate) were prepared by the polyaddition of 2, 5- difluoroterephthalic acid with various aromatic bis (epoxide) s catalyzed by tetrabutyl ammonium bromide.
![2-[[5-(oxiran-2-ylmethoxy)naphthalen-1-yl]oxymethyl]oxirane Structure](https://image.chemsrc.com/caspic/300/27610-47-5.png)
