Solvent‐free one‐pot synthesis of some azo disperse dyes under microwave irradiation: Dyeing of polyester fabrics

Abstract

The one-pot synthesis of some azo disperse dyes were carried by heating of aniline, sodium nitrite, potassium hydrogen sulfate with active methylene compounds under focused microwave heating in absence of the solvent. Also, by heating of diazoaminobenzene with active methylene in acetic acid solution, in the presence of few drops of hydrochloric acid, were described. Syntheses of novel heterocyclic aromatic compounds as potential intermediates for preparation of azo disperse dyes were studied. The dyeing of polyester fabrics with disperse dyes by the use of high-temperature dyeing method at 1308C and carrier dyeing method were also used.

The effect of dispersing agent on the dyeing of polyester fabrics with disperse dyes derived from 1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile

“…Pyridinone disperse dye derivatives have found many applications on different fabrics [6][7][8][9]. Keeping in mind the biological importance of the above mentioned heterocyclic compounds and in continuation to our endeavour towards environmentally benign synthesis [10][11][12][13][14][15], we report herein, the synthesis of 1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile, 8, as a good precursors to novel arylhydrazono-1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitriles and their application as disperse dyes for the dyeing of polyester fabrics. Also the effect of dispersing agent on dye uptake and consequent dyeing properties are described.…”

Microwave, Ultrasound Assisted Dyeing- Part I: Dyeing characteristics of C.I. Disperse Red 60 on polyester fabric

“…Nowadays, one of the main aspects to be considered in textile processing is energy conservation. This target can be achieved by using microwave or ultrasound energies as effective and green approaches [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Synthesis of Some Novel Biologically Active Disperse Dyes Derived from 4-Methyl-2,6-dioxo-1-propyl-1,2,5,6-tetrahydro-pyridine-3-carbonitrile as Coupling Component and Their Colour Assessment on Polyester Fabrics

“…Moreover, the pyridinone nucleus has been proven to constitute the active part of several biologically active compounds [ 9 , 10 ]. Keeping in mind the biological importance of the above mentioned heterocyclic compounds and in continuation to our endeavor towards environmentally benign synthesis [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ], we report herein the synthesis of 4-methyl-2,6-dioxo-1-propyl-1,2,5,6-tetrahydro-pyridine-3-carbonitrile ( 8 ) as a good precursor to novel aryl- and heteroaryl-4-methyl-2,6-dioxo-1-propyl-1,2,5,6-tetrahydropyridine-3-carbonitriles and their application as disperse dyes for the dyeing of polyester fabrics. The antibacterial activities of these dyes were also studied.…”