Add time:08/02/2019         Source:sciencedirect.com

The asymmetric synthesis of the methyl ester of the natural β-amino acid of Onchidin (2S,3S)-methyl-3-amino-2-methyl-7-octynoate and its enantiomer is described. The preparation of an enantiomerically pure β-hydroxy acid through an enantioselective aldol condensation reaction and an intramolecular nucleophilic displacement to form a β-lactam intermediate are the key steps.

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