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Issue 22, 2016
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Tunable microwave-assisted aqueous conversion of seaweed-derived agarose for the selective production of 5-hydroxymethyl furfural/levulinic acid

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Abstract

A simple, highly efficient and tunable microwave-assisted conversion of seaweed-derived agarose into 5-hydroxymethyl furfural (5-HMF) or levulinic acid (LA), depending on the reaction conditions, is reported. The proposed system could be fine-tuned for the selective production of 5-HMF (ca. 51% yield) in the absence of any catalyst or alternatively to levulinic acid (64% yield) with the simple addition of 1% v/v sulfuric acid, both under optimized aqueous microwave irradiation conditions (10 min, 180 °C). Additionally, galactose could also be generated as the main product (45–77%) depending on the temperature and the addition of catalytic amounts of sulfuric acid. A plausible reaction mechanism is provided in which the formation of intermediates from the hydrolysis of agarose is critical to obtain 5-HMF and LA as final products.

Graphical abstract: Tunable microwave-assisted aqueous conversion of seaweed-derived agarose for the selective production of 5-hydroxymethyl furfural/levulinic acid

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Publication details

The article was received on 27 Jul 2016, accepted on 19 Sep 2016 and first published on 19 Sep 2016


Article type: Communication
DOI: 10.1039/C6GC02072K
Citation: Green Chem., 2016,18, 5971-5977
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    Tunable microwave-assisted aqueous conversion of seaweed-derived agarose for the selective production of 5-hydroxymethyl furfural/levulinic acid

    M. Francavilla, S. Intini, L. Luchetti and R. Luque, Green Chem., 2016, 18, 5971
    DOI: 10.1039/C6GC02072K

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