Volume 58, Issue 31 pp. 10558-10562
Communication

The Miharamycins and Amipurimycin: their Structural Revision and the Total Synthesis of the Latter

Dr. Shengyang Wang

Dr. Shengyang Wang

Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, 1200 Cai Lun Road, Shanghai, 201203 China

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Dr. Qingju Zhang

Dr. Qingju Zhang

National Engineering Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, 330022 China

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Yachen Zhao

Yachen Zhao

State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Prof. Jiansong Sun

Prof. Jiansong Sun

National Engineering Research Centre for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, 330022 China

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Wenjia Kang

Wenjia Kang

State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Fei Wang

Fei Wang

State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Dr. Haixue Pan

Dr. Haixue Pan

State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Prof. Gongli Tang

Prof. Gongli Tang

State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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Prof. Biao Yu

Corresponding Author

Prof. Biao Yu

State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032 China

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First published: 13 June 2019
Citations: 33

Graphical Abstract

Final piece of the puzzle: The structures of amipurimycin and the miharamycins have been resolved using chemical synthesis and X-ray diffraction analysis. The stereochemistry of amipurimycin has been corrected. The miharamycins have a trans-fused dioxabicyclo[4.3.0]nonane sugar scaffold, which was previously assigned as being in the cis configuration.

Abstract

The structural puzzle of amipurimycin, a peptidyl nucleoside antibiotic, is solved by total synthesis and X-ray diffraction analysis, with the originally proposed configurations at C3′ and C8′ inverted and those at C6′, C2′′, and C3′′ corrected. A similar structural revision of the relevant miharamycins is proposed via chemical transformations and then validated by X-ray diffraction analysis. The miharamycins bear an unusual trans-fused dioxabicyclo[4.3.0]nonane sugar scaffold, which was previously assigned as being in the cis configuration.

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