Abstract
(±)-Atenolol/(±)-propranolol and their acetates were incubated with the fungus Rhizopus arrhizus and Geotrichum candidum separately for different time intervals to afford (S)-atenolol/(S)-propranolol in good optical yield. The time and pH for this biotransformation was optimised. The present biodegradations using Rhizopus arrhizus and Geotrichum candidum provides a simple and useful method to obtain (S)-atenolol and (S)-propranolol which are active enantiomers of the β-adrenergic blockers.
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