Journal
JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
Volume 71, Issue 1-2, Pages 22-28Publisher
ELSEVIER
DOI: 10.1016/j.molcatb.2011.03.004
Keywords
3-Hydroxybutyric acid; Biopolymers; Gluconolactone; Lipase; Biocatalysis
Funding
- CNCSIS-UEFISCDI [368/2007]
- OTKA (National Found for Scientific Research Development, Hungary) [K-72524]
- TAMOP [4.2.1./B-09/1/KONV-2010-0007]
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Lipase-catalyzed reaction of 3-hydroxybutyric acid with u-glucono- -lactone at 5:1 molar ratio and 80 C yielded a mixture of moderate molecular weight linear and cyclic oligomers. The most efficient biocatalyst, Candida antarctica B lipase (Novozyme 435), allowed the synthesis of new oligomeric compounds with ring-opened gluconolactone units included in the oligomeric chain, without previous derivatization of the sugar, or activation of the acid monomer. The reaction medium nature had an important influence on the product composition. Although the main copolymer amount was synthesized in teabutanoliclimethylsulfoxide medium, the highest polymerization degrees, up to 9 for the copolymer, and 10 for the 3-hydroxybutyric acid homopolymer co-product, were achieved in solventless conditions. (C) 2011 Elsevier B.V. All rights reserved.
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