Laccase??Catalysed Homocoupling of Primary Aromatic Amines towards the Biosynthesis of Dyes

…, LO Martins, MP Robalo

Index: Sousa, Ana Catarina; Martins, Ligia O.; Robalo, M. Paula Advanced Synthesis and Catalysis, 2013 , vol. 355, # 14-15 p. 2908 - 2917

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Citation Number: 14

Abstract

Abstract: Coloured disubstituted benzoquinonimine trimeric structures are obtained as main reaction products of the oxidation of p-electron donor primary aromatic amines using two different laccases, CotA-laccase from Baccilus subtilus and TvL from Trametes versicolor. These orange-red to purple products, presenting high molar extinction coefficients, presumably result from oxidative homocoupling reactions, through the formation of NÀC ...