Combining Photo-Organo Redox- and Enzyme Catalysis Facilitates Asymmetric C-H Bond Functionalization

Wuyuan Zhang, Elena Fernández-Fueyo, Frank Hollmann, Laura Leemans Martin, Milja Pesic, Rainer Wardenga, Matthias Höhne, S Schmidt

Research output: Contribution to journalArticleResearchpeer-review

Abstract

In this study, we combined photo-organo redox catalysis and biocatalysis to achieve asymmetric C?H bond functionalization of simple alkane starting materials. The photo-organo catalyst anthraquinone sulfate (SAS) was employed to oxyfunctionalise alkanes to aldehydes and ketones. We coupled this light-driven reaction with asymmetric enzymatic functionalisations to yield chiral hydroxynitriles, amines, acyloins and α-chiral ketones with up to 99?% ee. In addition, we demonstrate functional group interconversion to alcohols, esters and carboxylic acids. The transformations can be performed as concurrent tandem reactions. We identified the degradation of substrates and inhibition of the biocatalysts as limiting factors affecting compatibility, due to reactive oxygen species generated in the photocatalytic step. These incompatibilities were addressed by reaction engineering, such as applying a two-phase system or temporal and spatial separation of the catalysts. Using a selection of eleven starting alkanes, one photo-organo catalyst and 8 diverse biocatalysts, we synthesized 26 products and report for the model compounds benzoin and mandelonitrile > 97?% ee at gram scale.
Original languageEnglish
Pages (from-to)80-84
Number of pages5
JournalEuropean journal of organic chemistry
Volume2019
Issue number1
DOIs
Publication statusPublished - 10 Jan 2019

Keywords

    Cite this

    Combining Photo-Organo Redox- and Enzyme Catalysis Facilitates Asymmetric C-H Bond Functionalization. / Zhang, Wuyuan; Fernández-Fueyo, Elena; Hollmann, Frank; Leemans Martin, Laura; Pesic, Milja; Wardenga, Rainer; Höhne, Matthias; Schmidt, S.

    In: European journal of organic chemistry, Vol. 2019, No. 1, 10.01.2019, p. 80-84.

    Research output: Contribution to journalArticleResearchpeer-review

    Zhang, Wuyuan ; Fernández-Fueyo, Elena ; Hollmann, Frank ; Leemans Martin, Laura ; Pesic, Milja ; Wardenga, Rainer ; Höhne, Matthias ; Schmidt, S. / Combining Photo-Organo Redox- and Enzyme Catalysis Facilitates Asymmetric C-H Bond Functionalization. In: European journal of organic chemistry. 2019 ; Vol. 2019, No. 1. pp. 80-84.
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    AU - Fernández-Fueyo, Elena

    AU - Hollmann, Frank

    AU - Leemans Martin, Laura

    AU - Pesic, Milja

    AU - Wardenga, Rainer

    AU - Höhne, Matthias

    AU - Schmidt, S

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    KW - Asymmetric synthesis

    KW - Enzymes

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