Chemoenzymatic cascade for stilbene production from cinnamic acid catalyzed by ferulic acid decarboxylase and an artificial metathease
M. A. Stephanie Mertens,‡ Daniel F. Sauer,‡ Ulrich Markel, Johannes Schiffels, Jun Okuda,* Ulrich Schwaneberg,* Catalysis Science & Technology, 2019, DOI: 10.1039/C9CY01412H
The combination of a decarboxylase and an artificial metathease in a chemoenzymatic cascade reaction for stilbene production with efficient removal of metal contamination is reported.
A chemoenzymatic cascade reaction involving a biocatalyst and a biohybrid catalyst for the production of stilbene derivatives was designed. Stepwise conversion of cinnamic acid as a renewable resource to valuable compounds was achieved in one pot in aqueous solution and under mild reaction conditions. The ferulic acid decarboxylase FDC1 from Saccharomyces cerevisiae was used for the conversion of cinnamic acid. In a following reaction, cross-metathesis of the styrene intermediate was performed with an artificial metathease, FhuA-GH, based on a Grubbs-Hoveyda catalyst incorporated into an engineered variant of the transmembrane protein Ferric hydroxamate uptake protein component A, FhuA. Intermediate workup steps and isolation of the styrene intermediates was not required, as both reaction steps proceeded in aqueous solution. In comparison to the protein-free catalyst, cascade reactions with the artificial metathease revealed a significant lower metal content after a simple extraction step. The cascade reaction is the first example of the combination of biocatalysts and biohybrid catalysts for efficient removal of metal impurities in the product fraction.Copyright: Catalysis Science & Technology