Abstract
Zn acetate is an efficient catalyst for the synthesis of novel 3,4-dihydropyridine-2(1H)-ones (DHPMs) scaffolds via a triple cascade Biginelli reaction among polynuclear carbaldehyde, lawsone, and thiourea. All newly prepared compounds were confirmed by various spectral analysis. UV–visible spectral analyses were performed to study their intense depth of color. Prepared dyes were evaluated for dyeing performance on nylon and polyester fabrics, including the wash, light, rubbing and sublimation fastness. A color assessment, determination of percentage exhaustion, and fixation properties were also investigated. Results of all these studies were compared with lawsone, which is one of the starting materials for the synthesis of all these new disperse dyes. It has been observed that the prepared novel dyes greatly impacted their dyeing properties on both fabrics compared to lawsone. They have shown brilliant shades, higher affinity, superior tinctorial strength, and higher adsorption capacity than the lawsone. This report reveals the significance of prepared disperse dyes with great application value for nylon and polyester fibers.
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