Asymmetric Hydrolysis of (R, S)-5-Acetoxymethyl-3-tert-butyl-oxazolidin-2-one with Enzymes and Microorganisms†

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Abstract
Enzymes and microorganisms were screened for the asymmetric hydrolysis of (R, S)-5-acetoxymethyl-3-tert-butyl-oxazolidin-2-one 1. Lipases from Pseudomonas aeruginosa and Alcaligenes species, and microorganisms which belong to Enterobacter species or Klebsiella species were found to hydrolyze 1 enantioselectively to give (R)-5-hydroxymethyl-3-tert-butyl-oxazolidin-2-one (R)-2 and (S)-l. (S)-2, one of the typical intermediates for preparing optically active β-blocking agents (β-blockers), was obtained with high enantiomeric excess (91~98% e.e.) from (S)-1.