Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Enzyme-Catalyzed Polymerization of Beta-alanine Esters, A Sustainable Route Towards the Formation of Poly-Beta-alanine
Steunenberg, P. ; Uiterweerd, M. ; Sijm, M. ; Scott, E.L. ; Zuilhof, H. ; Sanders, J.P.M. ; Franssen, M.C.R. - \ 2013
Current Organic Chemistry 17 (2013)7. - ISSN 1385-2728 - p. 682 - 690.
nitrogen-containing chemicals - ring-opening polymerization - amino-acids - organic-solvents - biobased production - peptides - lactams - lipases - biotransformations - esterification
The synthesis of poly-ß-alanine by a lipase catalyzed polycondensation reaction between ß-alanine esters is reported. The effect of different solvents, reaction temperatures and substrate/enzyme concentrations on polymer yield and degree of polymerization (DP) was determined. Also the effect of methyl substituents at the a and ß position of ß-alanine was studied. Cross-Linked Enzyme Aggregates (CLEA) of Candida antarctica lipase B converted ß-alanine esters into polymers in high yield (up to 90%) and with high (DP) (up to 53 units). Optimum results were obtained when methyl esters are used in methyl tert-butyl ether (MTBE) as the solvent, at 50°C for 16 h.
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