Selective depolymerisation of γ-oxidised lignin via NHC catalysed redox esterification
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The development of new catalytic methods for the processing of lignocellulose‐derived renewable feedstocks continues to gain momentum, despite the considerable challenges associated with the use of complex biopolymers such as lignin. Here, we report a new two‐step depolymerisation method for lignin involving primary alcohol oxidation followed by a NHC‐mediated redox esterification‐depolymerisation step. The process takes advantage of the inherent structure of the β‐aryl ether units present in the specific type of lignin that was used (butanosolv) and delivers 4 novel aromatic monomers which retain the C3 side chain present in the lignin subunits. The utility of the major product is assessed suggesting that rapid access to a wide range of interesting chemical could be achieved from this renewable building block.
Xiao , G , Lancefield , C & Westwood , N J 2019 , ' Selective depolymerisation of γ-oxidised lignin via NHC catalysed redox esterification ' , ChemCatChem , vol. Early View . https://doi.org/10.1002/cctc.201900787
Copyright © 2019 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/cctc.201900787
DescriptionThis work was supported by the China Scholarship Council-St Andrews PhD Fellowship (GX). C.S.L. thanks the Leverhulme Trust Early Career Fellowship (ECF-2018-480) and the University of St Andrews.
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