Stereoselective synthesis of novel benzoins catalysed by benzaldehyde lyase in a gel-stabilised two-phase system
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Asymmetric benzoin condensation was performed using recombinant benzaldehyde lyase (BAL) from Pseudomonas fluorescens Biovar I. To enable the conversion of hydrophobic substrates, the enzyme was entrapped in polyvinyl alcohol and suspended in hexane. Compared to the reported application of the biocatalyst in an aqueous phase containing 20% DMSO, the productivity of the resulting gelstabilised two-phase system was 3-fold better. The entrapment process had an efficiency of O90%, no enzyme or cofactor was lost during reaction or storage. The entrapped enzyme was stable in hexane for 1 week at 4 8C and more than 1 month at K20 8C. Without preceding optimisation the novel benzoins (R)-1,2-di(3-furanyl)-2-hydroxyethanone, (R)-2-hydroxy-1,2-di(3-thienyl) ethanone, (R)-1,2-di(4-ethoxyphenyl)-2-hydroxyethanone, (R)-1,2-di(3-ethoxyphenyl)-2-hydroxyethanone, (R)-2-hydroxy-1,2-di(3-tolyl)ethanone, and (R)-1,2-di(benzofuran-2-yl)-2-hydroxyethanone were prepared with yields up to 31.8% and enantiomeric excess O99%.
Details
Original language | English |
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Pages (from-to) | 7378-7383 |
Number of pages | 6 |
Journal | Tetrahedron |
Volume | 2005 |
Issue number | 61 |
Publication status | Published - 2005 |
Peer-reviewed | Yes |
Externally published | Yes |
External IDs
Scopus | 21744459715 |
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ORCID | /0000-0002-2912-546X/work/171551924 |
Keywords
Keywords
- Benzoin, Benzaldehydlyase, BAL, Hydrogel, Lösungsmittel, Biokatalyse