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

Journal Article

Abdel-Megeed, Mohamed F. . 2013

• Publication Work Type: Research
• Publication Online URL: Diphenyl (4'-(aryldiazenyl)biphenyl-4-ylamino)(pyridin-3-yl)methylphosphonates as Azo Disperse Dyes for Dyeing Polyester Fabrics
• Tags: http://dx.doi.org/10.1155/2013/308419
• Magazine \ Newspaper: Journal of Chemistry
• Volume Number: Volume 2013
• Pages: 5 Pages

Publication Abstract

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 3–8 in 82-88% yields after crystallization. The dyes produced were applied to polyesters as disperse dyes and their fastness properties were elevated.