Abstract
Seven strains of the fungus Aspergillus terreus isolated from several provenances in Brazil, catalyzed biotransformations of ortho-, meta- and para-nitrophenyl compounds at different pH values. ortho-Nitroacetophenone and meta-nitroacetophenone were transformed into ( S)-(+)-1-( ortho-nitrophenyl)ethanol and ( S)-(−)-1-( meta-nitrophenyl)ethanol with high enantiomeric excess (e.e. ≥98%) and conversion (≥98%) by all the strains used. Deracemization of ( RS)-1-( meta-nitrophenyl)ethanol was obtained with high selectivity (e.e. up to ≥98%) and good conversion ( c 98%). The biotransformations in acidic medium using these fungus strains were more efficient than under basic or neutral conditions.
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