Volume 60, Issue 29 pp. 15963-15971
Research Article

Bioinspired Network Analysis Enabled Divergent Syntheses and Structure Revision of Pentacyclic Cytochalasans

Hai Wu

Hai Wu

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

University of Chinese Academy of Sciences, Beijing, 100049 China

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 China

These authors contributed equally to this work.

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Yiming Ding

Yiming Ding

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

University of Chinese Academy of Sciences, Beijing, 100049 China

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 China

These authors contributed equally to this work.

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Kun Hu

Kun Hu

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

These authors contributed equally to this work.

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Xianwen Long

Xianwen Long

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

University of Chinese Academy of Sciences, Beijing, 100049 China

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 China

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Chunlei Qu

Chunlei Qu

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

University of Chinese Academy of Sciences, Beijing, 100049 China

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 China

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Prof. Dr. Pema-Tenzin Puno

Corresponding Author

Prof. Dr. Pema-Tenzin Puno

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

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Prof. Dr. Jun Deng

Corresponding Author

Prof. Dr. Jun Deng

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201 China

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 China

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First published: 15 April 2021
Citations: 12

Dedicated to the 100th anniversary of Chemistry at Nankai University

Graphical Abstract

The bioinspired, divergent total syntheses of trichodermone and trichoderone A were accomplished from a common biogenetic precursor, aspochalasin Z. Key steps include transannular alkene cyclizations, a singlet oxygen ene reaction, and hydrogen atom transfer (HAT) cascade reactions. This approach validates the proposed biosynthetic pathway from a chemical perspective and paves the way for the synthesis and characterization of other cytochalasans.

Abstract

We accomplished the divergent total syntheses of ten pentacyclic cytochalasans (aspergillin PZ, trichodermone, trichoderones, flavipesines, and flavichalasines) from a common precursor aspochalasin D and revised the structures of trichoderone B, spicochalasin A, flavichalasine C, aspergilluchalasin based on structure network analysis of the cytochalasans biosynthetic pathways and DFT calculations. The key steps of the syntheses include transannular alkene/epoxyalkene and carbonyl-ene cyclizations to establish the C/D ring of pentacyclic aspochalasans. Our bioinspired approach to these pentacyclic cytochalasans validate the proposed biosynthetic speculation from a chemical view and provide a platform for the synthesis of more than 400 valuable cytochalasans bearing different macrocycles and amino-acid residues.

Conflict of interest

The authors declare no conflict of interest.

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