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J Am Chem Soc. 2009 Nov 25;131(46):16632-3. doi: 10.1021/ja908399s.

Total synthesis of (-)-nakadomarin A.

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  • 1Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, UK.

Abstract

A short and highly stereoselective synthesis of (-)-nakadomarin A has been developed using combinations of catalyst-controlled bond formations, one-pot multistep procedures, and powerful route-shortening reaction cascades. Several unprecedented chemical transformations were developed, including a highly Z-selective, eight-membered-ring-forming intramolecular Julia-Kocienski reaction, a highly diastereoselective intramolecular furan/iminium ion cyclization, and a sulfonic acid-controlled Z-selective macrocyclic ring-closing metathesis. In conjunction with a diastereoselective nitro olefin Michael addition under bifunctional organocatalysis and a nitro-Mannich/lactamization cascade, these transformations allowed the construction of this architecturally complex natural product in significant quantities in 12 steps (longest linear sequence) from commercially available starting materials.

PMID:
19883080
[PubMed - indexed for MEDLINE]
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