Journal
ORGANIC LETTERS
Volume 2, Issue 24, Pages 3949-3952Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol006735q
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Enantiopure (S)-N-substituted 4-hydroxy-pyrrolidin-2-ones have been prepared for the first time by regio- and stereoselective hydroxylation of the corresponding pyrrolidin-2-ones by use of a biocatalyst. Hydroxylation of 6 and 8 with Sphingomonas sp. HXN-200 afforded 68% of (S)-7 in >99.9% ee and 46% of (S)-9 in 92% ee, respectively. Simple crystallization increased the ee of (S)-9 to 99.9% in 82% yield.
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