Volume 126, Issue 43 pp. 11784-11788
Zuschrift

Synthesis of Polyketide Stereoarrays Enabled by a Traceless Oxonia-Cope Rearrangement

Lin Yang

Lin Yang

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032 (China) http://honggroup.sioc.ac.cn

These authors contributed equally to this work.

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Guoli He

Guoli He

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032 (China) http://honggroup.sioc.ac.cn

These authors contributed equally to this work.

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Ruifeng Yin

Ruifeng Yin

College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004 (China)

These authors contributed equally to this work.

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Dr. Lili Zhu

Dr. Lili Zhu

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032 (China) http://honggroup.sioc.ac.cn

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Prof. Dr. Xiaoxia Wang

Prof. Dr. Xiaoxia Wang

College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004 (China)

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Prof. Dr. Ran Hong

Corresponding Author

Prof. Dr. Ran Hong

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032 (China) http://honggroup.sioc.ac.cn

CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, CAS, 345 Lingling Road, Shanghai 200032 (China) http://honggroup.sioc.ac.cnSearch for more papers by this author
First published: 04 September 2014
Citations: 4

Financial support from the National Natural Science Foundation of China (No. 21290184), The MOST (2010CB833200), and Chinese Academy of Sciences are highly appreciated. We thank Wenhua Li for the kinetic resolution of the racemic allenic alcohol (rac-1 a). We also thank Dr. Rob Hoen (GP Pharm, Spain) and Dr. Jeremy R. Duvall (The Broad Institute, MA) for helpful discussions.

Abstract

Polyketide antibiotics bearing skipped polyols represent a synthetic challenge. A SiCl4-promoted oxonia-Cope rearrangement of syn,syn-2-vinyl-1,3-diols was developed to forge an array of 1,5-pentenediols, thus providing versatile motifs for the preparation of 1,2,3,5-stereoarrays in a highly stereoselective manner. Further exploration with Sn(OTf)2 realized the rearrangement of a cross-aldehyde which tactically warrants the utility of the current approach to access complex polyketides. The origin of high stereoselectivity is attributed to a chairlike anti-conformation of the oxonium ion intermediate.

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