Synthesis and Dyeing Performance of Some Novel Heterocyclic Azo Disperse Dyes

Abstract

A síntese de novos azocorantes heterocíclicos derivados de 5-acetil-2-amino-4-metiltiazol (1) utilizando-se de vários N-alquil derivados da anilina (2a-e) e suas performances como corantes dispersos foram avaliadas em tecidos de poliester e nylon. As propriedades espectrais desses corantes foram determinadas. Os tecidos tingidos mostraram fixação moderada a boa na presença de luz, boa estabilidade à fricção, transpiração, lavagem e excelente estabilidade à sublimação. Esses corantes forneceram tonalidades de cor variando entre laranja e vermelho com boa profundidade e distribuição nos tecidos.The synthesis of some novel heterocyclic azo disperse dyes derived from 5-acetyl-2-amino-4methylthiazole (1) using various N-alkyl derivatives of aniline (2a-e) and their dyeing performance as disperse dyes have been assessed on polyester and nylon fabrics. The spectral properties of these dyes were measured. The dyed fabrics show moderate to good light fastness, very good rubbing, perspiration, washing fastness and excellent sublimation fastness. These dyes have been found to give bright orange-red colour hues with very good depth and levelness on fabrics. The dyebath exhaustion on fabrics has been found to be very good.

Biocidal polymers (I): Preparation and biological activity of some novel biocidal polymers based on uramil and its azo-dyes

“…From the IR data the azo group peak appeared around 1411 cm -1 [33,34] in both of the two monomers (13 & 24) (and in the resulting polymers) indicating that the coupling was successful. This method of preparation resulted in the development of MHBP with an even greater number of available halogens than polymers (2) and (7).…”

Synthesis of New Heterocyclic Derivative [4-(2-Phenyl-2,3-Dihydrobenzo-1,3-Oxazepine-4,7-Dione)benzaldehyde].

“…[1] of the schiff base (Sch) showed appearance of absorption bond at (1598) cm -1 was due to the (C=N) of imine group (17) . FT.IR spectrum also showed the appearance of the sharp strong absorption band at (1660) cm -1 was due to the (C=O) of aldehyde group (18) and the weak of absorption bonds at (2821) cm -1 and (2796) cm -1 were attributed to the (C-H) of aldehyde group (19) . The FT.IR spectrum, Fig.…”

Synthesis of pyrazole, 1,3-dithiolan and thiophene derivatives pendant to thiazolo[2,3-c]-1,2,4-triazole moiety

“…5-Acetyl-2-amino-4-methylthiazole salt (1) was prepared according to the reported literature [36]. The freshly diazonium salt 1 (10 mmol) was added portionwise with stirring to a cold solution (0-5  C) of 3-chloropentane-2,4-dione (2) (10 mmol) in ethanol (50 mL) in the presence of AcONa.3H2O (2 g) over period of 30 min.…”