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Issue 7, 2016
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Chemoselective oxidant-free dehydrogenation of alcohols in lignin using Cp*Ir catalysts

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Abstract

A remarkably effective method of chemoselective dehydrogenation of alcohols in lignin has been developed with an iridium catalyst. An additional operation of Zn/NH4Cl via a two-step one pot process could further promote the cleavage of the C–O bond in β-O-4 units in lignin. And this reaction system was also applicable to native lignin as the molecular weight of native lignin decreased obviously as detected by gel permeation chromatography (GPC). Additionally, this is the first to date generation of the by-product H2 from native lignin and the by-product was straightforwardly captured by 1-decene. A probable mechanistic pathway was also proposed with the help of density functional theory (DFT) calculations.

Graphical abstract: Chemoselective oxidant-free dehydrogenation of alcohols in lignin using Cp*Ir catalysts

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Publication details

The article was received on 30 Sep 2015, accepted on 06 Nov 2015 and first published on 06 Nov 2015


Article type: Paper
DOI: 10.1039/C5GC02347E
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Green Chem., 2016,18, 2029-2036

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    Chemoselective oxidant-free dehydrogenation of alcohols in lignin using Cp*Ir catalysts

    R. Zhu, B. Wang, M. Cui, J. Deng, X. Li, Y. Ma and Y. Fu, Green Chem., 2016, 18, 2029
    DOI: 10.1039/C5GC02347E

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