Entrapment of Pseudomonas cepacia lipase with peracetylated β-cyclodextrin in sol-gel

Application to the kinetic resolution of secondary alcohols

Ashraf Ghanem, Volker Schurig

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Co-lyophilized Pseudomonas cepacia lipase with peracetylated β-cyclodextrin was immobilized by the sol-gel process. The gel-entrapped lipase/cyclodextrin was prepared by the hydrolysis of methyltrimethoxysilane (MTMS) in the presence of the co-lyophilized lipase with peracetylated β-cyclodextrin prepared with different weight ratios (enzyme to CD). This type of enzyme preparation was subsequently used in the kinetic resolution of a set of secondary alcohols using isopropenyl acetate as an innocuous acyl donor in toluene as the organic medium. The resulting chiral alcohols (substrate) and the corresponding acetates (product) were baseline separated in one analysis without derivatization using gas chromatography on a new chiral stationary phase (CSP) Chirasil-β-Dex containing an undecamethylene spacer (C11-Chirasil-Dex).

Original languageEnglish
Pages (from-to)2547-2555
Number of pages9
JournalTetrahedron Asymmetry
Volume14
Issue number17
DOIs
Publication statusPublished - 5 Sep 2003
Externally publishedYes

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pseudomonas
entrapment
Cyclodextrins
Lipases
Lipase
Sol-gels
enzymes
acetates
alcohols
Alcohols
gels
Kinetics
kinetics
sol-gel processes
Enzymes
gas chromatography
spacers
hydrolysis
toluene
Enzyme kinetics

Cite this

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abstract = "Co-lyophilized Pseudomonas cepacia lipase with peracetylated β-cyclodextrin was immobilized by the sol-gel process. The gel-entrapped lipase/cyclodextrin was prepared by the hydrolysis of methyltrimethoxysilane (MTMS) in the presence of the co-lyophilized lipase with peracetylated β-cyclodextrin prepared with different weight ratios (enzyme to CD). This type of enzyme preparation was subsequently used in the kinetic resolution of a set of secondary alcohols using isopropenyl acetate as an innocuous acyl donor in toluene as the organic medium. The resulting chiral alcohols (substrate) and the corresponding acetates (product) were baseline separated in one analysis without derivatization using gas chromatography on a new chiral stationary phase (CSP) Chirasil-β-Dex containing an undecamethylene spacer (C11-Chirasil-Dex).",
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