Mazzone JR, Zercher CK. Syntheses of papyracillic acids: application of the tandem chain extension-acylation reaction.
J Org Chem 2012;
77:9171-8. [PMID:
23013246 DOI:
10.1021/jo3017617]
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Abstract
A synthetic approach to the papyracillic acid family of natural products has been developed. The spiroacetal core is rapidly assembled through an unprecedented zinc carbenoid-mediated tandem chain extension-acylation reaction. Subsequent functional group manipulation provided access to papyracillic acid B and 4-epi-papyracillic acid C. The successful preparation of these molecules resulted in the clarification of structural assignments of members of this family of natural products.
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