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Toward the synthesis of cobyric acid. Enantioselective syntheses of completely differentiated ring D synthons.


ABSTRACT: Alkyne acids 11 were prepared in an enantioselective fashion from allylic ester derivatives 18 or 20 by Ireland-Claisen rearrangement, followed by Si-assisted elimination of HBr. The title compounds are attractive ring D synthons for an ongoing synthesis of cobyric acid.

SUBMITTER: Wang H 

PROVIDER: S-EPMC2575186 | BioStudies | 2008-01-01

REPOSITORIES: biostudies

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