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Issue 22, 2016
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Eco-friendly synthesis of indo dyes mediated by a bacterial laccase

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Abstract

Several aminoindamine and indoaniline dyes were obtained in good to excellent yields (64–98%) by oxidative cross-coupling between 1,4-phenylenediamine (1), 4-aminophenol (2) or 2,5-diaminotoluene (3) and several meta- and meta,para-substituted couplers (4a–j) using a green biocatalyst, the bacterial enzyme CotA-laccase from Bacillus subtilis, in water and under mild conditions of pH and temperature. Our results show that the enzymatic route described represents an efficient and sustainable alternative to the chemical synthesis of indo dyes, with a potentially high impact in the cosmetic and hair dye industries.

Graphical abstract: Eco-friendly synthesis of indo dyes mediated by a bacterial laccase

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Publication details

The article was received on 25 Jul 2016, accepted on 16 Aug 2016 and first published on 16 Aug 2016


Article type: Paper
DOI: 10.1039/C6GC02050J
Citation: Green Chem., 2016,18, 6063-6070
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    Eco-friendly synthesis of indo dyes mediated by a bacterial laccase

    A. C. Sousa, M. F. M. M. Piedade, L. O. Martins and M. P. Robalo, Green Chem., 2016, 18, 6063
    DOI: 10.1039/C6GC02050J

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