Publications
ACS Sustainable Chemistry & EngineeringOct 2024 |
12
(
41
),
14978-14987
DOI:
10.1021/acssuschemeng.4c02094

Chemoenzymatic Synthesis of Aromatic Vinyl Monomers from Biorenewable 5-Hydroxymethyl-2-Furfural

Ceyhan, Kubilay; Wagner, Jessica; Hacker, Felix B.; Gröger, Harald
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Abstract
5-Hydroxymethyl-2-furfural (5-HMF), derived from biomass, is a versatile precursor for various chemicals, including pharmaceuticals, biofuels, plastics, and polymers. This study focuses on synthesizing aromatic vinyl monomers from 5-hydroxymethyl-2-vinylfuran (5-HMVF). Initial steps involve a high-yield Wittig synthesis from 5-HMF, resulting in a 95% yield. Enzymatic synthesis using immobilized CAL-B (iCALB) yields 5-HMVF acetate, n-butyrate, and benzoate in quantitative yields and demonstrates effective enzyme reuse. An alternative TEMPO oxidation route produces 5-vinylfuran-2-carbaldehyde (5-VFA) with a 61% yield, which is further converted to E- and Z-5-vinylfuran-2-carboxime (5-VFO) and subsequently to 5-vinylfuran-2-carbonitrile (5-VFN) via chemocatalytic dehydration. Biocatalytic dehydration of E- and Z-5-VFO to the corresponding nitriles is performed using different aldoxime dehydratases (Oxd) in water as a sustainable solvent. Polymerization of all monomers yields characterized polymer products analyzed by TGA, DSC, SEC, and FTIR spectroscopy.
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