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Advisor(s)
Abstract(s)
An eco-friendly protocol for the synthesis of azobenzene dyes by oxidative coupling of primary aromatic amines is reported. As efficient biocatalytic systems, CotA laccase and CotA laccase/ABTS (2,2’-azinobis(3-ethylbenzo-thiazoline-6-sulfonic acid)) enablethe oxidation of various substituted anilines, in aqueous medium, ambient atmosphere and under mild reaction conditions of pH and temperature. A series of azobenzene dyes were prepared in good to excellent yields in an one-potreaction. Amechanistic proposal for the formation of the azoderivatives is presented. Our strategy offers an alternative approach for the direct synthesis of azobenzene dyes, avoiding the harsh conditions generally required formost of the traditional synthetic methods.
Description
Keywords
Biocatalysis Dyes/pigments Green chemistry Laccases Oxidative coupling
Citation
SOUSA, Ana Catarina; [et al] – Synthesis of azobenzene dyes mediated by cotA laccase. Chemistry - an Asian Journal. ISSN 1861-471X. Vol. 14, N.º 1 (2019), pp. 187-193
Publisher
Wiley-VCH Verlag