Microbial deracemisation of N-(1-hydroxy-1-phenylethyl)benzamide
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Add time:07/11/2019 Source:sciencedirect.com
Microbial deracemisation of racemic N-(1-hydroxy-1-phenylethyl)benzamide to give the (R)-enantiomer is described using whole cells of Cunninghamella echinulata NRRL 1384. The deracemisation involves fast highly (S)-selective oxidation followed by slower partially (S)-selective reduction of the intermediate ketone. The yield and ee of (R)-N-(1-hydroxy-1-phenylethyl)benzamide were optimised (82%, 98% ee) by removal of a competing extracellular amidase/protease activity by using static cells at pH 5. Use of the protease inhibitor PMSF with growing cells leads to a slower deracemisation (82% ee) but a very high (98%) overall recovery of alcohol and ketone.
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