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Journal of Chemistry
Volume 2013, Article ID 308419, 5 pages
Research Article

Diphenyl (4′-(Aryldiazenyl)biphenyl-4-ylamino)(pyridin-3-yl)methylphosphonates as Azo Disperse Dyes for Dyeing Polyester Fabrics

1Department of Chemistry, Faculty of Science, University of Tanta, Tanta 31527, Egypt
2School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK

Received 17 June 2012; Accepted 23 August 2012

Academic Editor: Ana Cristi Basile Dias

Copyright © 2013 Mohamed F. Abdel-Megeed et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Diphenyl (4′-aminobiphenyl-4-ylamino)(pyridin-3-yl)methylphosphonate (1) was synthesized in 88% yield from reaction of pyridine-3-carboxaldehyde with benzidine and triphenylphosphite in the presence of titanium tetrachloride as a catalyst. Diazotization of 1 gave the corresponding diazonium salt 2 which was coupled with several hydroxyl or amino compounds to give the corresponding azo dyes 38 in 82–88% yields after crystallization. The dyes produced were applied to polyesters as disperse dyes and their fastness properties were elevated.