Eco-Friendly Synthesis of Some Thiosemicarbazones and Their Applications as Intermediates for 5-Arylazothiazole Disperse DyesReport as inadecuate




Eco-Friendly Synthesis of Some Thiosemicarbazones and Their Applications as Intermediates for 5-Arylazothiazole Disperse Dyes - Download this document for free, or read online. Document in PDF available to download.

1

Textile Research Division, National Research Center, Dokki 12622, Egypt

2

Department of Chemistry, Faculty of Science, Taif University, P. O. Box 888, Taif 21974, Saudi Arabia

3

Department of Chemical Engineering, Higher Institute for Engineering and Technology, Central Zone, 4th District, New Damietta, Damietta, Egypt





*

Author to whom correspondence should be addressed.



Academic Editor: Philippe Belmont

Abstract The solid-solid reactions of thiosemicarbazide with 4-formylantipyrine, 2-acetylpyrrole and camphor were performed to afford the thiosemicarbazones 1–3 which underwent hetero-cyclization with phenacyl bromide to furnish the corresponding thiazole derivatives 4–6. The yields of the reactions are quantitative in all cases and the products do not require further purification. A series of 5-arylazo-2-substituted ylidene-hydrazinyl-thiazole dyes 7–9 was then prepared by diazo coupling of thiazole derivatives 4–6 with several diazonium chlorides. The synthesized dyes were applied as disperse dyes for dyeing polyester fabric. The dyed fabrics exhibit good washing, perspiration, sublimation and light fastness properties, with little variation in their moderate to good rubbing fastness. View Full-Text

Keywords: solid-solid reactions; thiosemicarbazones; phenacyl bromide; 5-arylazothiazoles; disperse dyes; fastness properties. solid-solid reactions; thiosemicarbazones; phenacyl bromide; 5-arylazothiazoles; disperse dyes; fastness properties.





Author: Hatem E. Gaffer 1 and Mohamed E. Khalifa 2,3,*

Source: http://mdpi.com/



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