Studies on organophosphorus compounds—XLI

Synthesis of Some Novel Arylazo Disperse Dyes Derived from 5-Amino-tetrazolo[1,5-a]pyrimidin-7-ol as Coupling Component and Investigation of Their Absorption Spectra

“…6-(o-Methoxyphenylazo)-5-amino-tetrazolo[1,5-a]pyrimidin-7-ol (1). A solution of o-methoxyphenyldiazonium chloride, which was prepared from o-methoxyaniline (0.36 g, 1.5 mmol), sodium nitrite (0.18 g, 1.5 mmol) and conc.…”

“…It has been known for many years that the azo compounds are the most widely used class of dyes due to their versatile application in various fields such as the dyeing of textile fiber, the coloring of different materials, colored plastic, and advanced applications in organic synthesis. Some of these compounds are also applied in medicine due to their biological and pharmacological activities which exhibit an anti-inflammatory, fungicidal, bactericidal, plant growth regulating properties, antipyretic, and protein kinase inhibitors [1][2][3][4][5][6][7][8][9][10]. Some azopyrimidine derivatives also find application in dyes and complexes [11][12][13][14].…”

“…Although a number of articles have been published concerning the synthesis of pyrimidine and azopyrimidine derivatives, those containing an azotetrazolo pyrimidine system of pyrimidines have not yet been reported. In continuation of our work, we report here the synthesis of 5-amino-tetrazolo[1,5-a]pyrimidin-7-ol (I) and its disperse arylazo dyes (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). The spectral characteristics of prepared compounds are also reported.…”

Pyridazine derivatives and related compounds. 23*. Synthesis of 3-substituted pyrazolo[3,4-c]pyridazines and their application as disperse dyes

“…The changes in color coordinates between dyes 6a-t (Table 6) are remarkable in view of minor variations of the absorption maxima in solution. The dyed fabrics exhibit a very good to excellent (4)(5) washing, perspiration, rubbing, and sublimation fastness properties ( Table 4). The remarkable degree of levelness and brightness after washings is indicative of a good penetration and excellent affinity of these dyes for the fabric due to the accumulation of polar groups.…”

Pyridazine and its related compounds: Part 33. Synthesis of some disperse dyes derived from 3-hydrazinyl-4,5-diphenyl-1H-pyrazolo[3,4-c]pyridazine and their color assessment on polyester fabric

“…On the other hand, some pyrazole derivatives are very important class of heterocycles due to their biological and pharmacological activities [2,3]. Also, they are used as key starting material for the synthesis of commercial aryl/ hetarylazopyrazole dyes [4].…”