Stereoselective synthesis of novel benzoins catalysed by benzaldehyde lyase in a gel-stabilised two-phase system

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Tanja Hischer - , Rheinisch-Westfälische Technische Hochschule Aachen (Erstautor:in)
  • Dörte Gocke - , Rheinisch-Westfälische Technische Hochschule Aachen (Autor:in)
  • Maria Fernandez - (Autor:in)
  • Pilar Hoyos - (Autor:in)
  • Andres Alcantara - (Autor:in)
  • Jose Sinisterra - (Autor:in)
  • Winfried Hartmeier - (Autor:in)
  • Marion Bettina Ansorge-Schumacher - , Rheinisch-Westfälische Technische Hochschule Aachen (Autor:in)

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

OriginalspracheEnglisch
Seiten (von - bis)7378-7383
Seitenumfang6
FachzeitschriftTetrahedron
Jahrgang2005
Ausgabenummer61
PublikationsstatusVeröffentlicht - 2005
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

Scopus 21744459715
ORCID /0000-0002-2912-546X/work/171551924

Schlagworte

Schlagwörter

  • Benzoin, Benzaldehydlyase, BAL, Hydrogel, Lösungsmittel, Biokatalyse