Chemistry: Faculty Publications (1990-2023)

Enantiodivergent, Biocatalytic Routes to Both Taxol Side Chain Antipodes

Document Type

Article

Publication Date

11-13-2005

Publication Title

Journal of Organic Chemistry

DOI

10.1021/jo0516077

ISSN

1520-6904

Abstract

Two enantiocomplementary bakers' yeast enzymes reduced an alpha-chloro-beta-keto ester to yield precursors for both enantiomers of the N-benzoyl phenylisoserine Taxol side chain. After base-mediated ring closure of the chlorohydrin enantiomers, the epoxides were converted directly to the oxazoline form of the target molecules using a Ritter reaction with benzonitrile. These were hydrolyzed to the ethyl ester form of the Taxol side chain enantiomers under acidic conditions. This brief and atom-efficient route to both target enantiomers demonstrates both the synthetic utility of individual yeast reductases and the power of genomic strategies in making these catalysts available.

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