Three novel azo disperses dyes were designed, synthesized, and characterized by utilizing of α-aminophosphonates chromophors. The target compounds were prepared by employing of benzidine as amine and different heterocyclic formyl as aldehyde, and triphenylphosphite P(OC6H5)3 that gives -aminophosphonate in one position and free amino group in the other position, which was then coupled with β–naph...