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Tunable Production of ()- or ()-Citronellal from Geraniol via a Bienzymatic Cascade Using a Copper Radical Alcohol Oxidase and Old Yellow Enzyme. | LitMetric
Biocatalytic pathways for the synthesis of (-)-menthol, the most sold flavor worldwide, are highly sought-after. To access the key intermediate ()-citronellal used in current major industrial production routes, we established a one-pot bienzymatic cascade from inexpensive geraniol, overcoming the problematic biocatalytic reduction of the mixture of ()-isomers in citral by harnessing a copper radical oxidase (AlcOx) and an old yellow enzyme (OYE). The cascade using OYE2 delivered 95.1% conversion to ()-citronellal with 95.9% , a 62 mg scale-up affording high yield and similar optical purity. An alternative OYE, GluER, gave ()-citronellal from geraniol with 95.3% conversion and 99.2% .
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