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|Type:||Artigo de periódico|
|Title:||Asymmetric bioreduction of ethyl 3-halo-2-oxo-4-phenylbutanoate by Saccharomyces cerevisiae immobilized in Ca-alginate beads with double gel layer|
|Abstract:||The asymmetric bioreduction of ethyl 3-halo-2-oxo-4- phenylbutanoate was studied for several microorganisms and especially for Saccharomyces cerevisiae. The highest chemical yield (90%), de (70%) and ee (96-99%) were obtained with S. cerevisiae immobilized in calcium alginate beads with double gel layers, and reaction conditions were optimized by changing matrix of immobilization, concentration of substrate, and feeding with glucose as electron donor. The entrapment of cells with double gel layers was fundamental to achieve high enantio- and diastereoselectivity.|
|Editor:||Amer Chemical Soc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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