Volume 55, Issue 12 pp. 4069-4073
Communication

Structural Revisions of a Class of Natural Products: Scaffolds of Aglycon Analogues of Fusicoccins and Cotylenins Isolated from Fungi

Dr. Ying Tang

Dr. Ying Tang

Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

These authors contributed equally to this work.

Search for more papers by this author
Dr. Yongbo Xue

Dr. Yongbo Xue

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

These authors contributed equally to this work.

Search for more papers by this author
Prof. Guang Du

Prof. Guang Du

Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

These authors contributed equally to this work.

Search for more papers by this author
Prof. Jianping Wang

Prof. Jianping Wang

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

Search for more papers by this author
Prof. Junjun Liu

Prof. Junjun Liu

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

Search for more papers by this author
Bin Sun

Bin Sun

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

Search for more papers by this author
Dr. Xiao-Nian Li

Dr. Xiao-Nian Li

State Key Laboratory of Phytochemistry and Plant Resources in West China, Chinese Academy of Sciences, Kunming, China

Search for more papers by this author
Prof. Guangmin Yao

Prof. Guangmin Yao

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

Search for more papers by this author
Dr. Zengwei Luo

Dr. Zengwei Luo

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

Search for more papers by this author
Prof. Yonghui Zhang

Corresponding Author

Prof. Yonghui Zhang

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030 China

Search for more papers by this author
First published: 24 February 2016
Citations: 63

Graphical Abstract

Brass tacks: A class of natural products (NPs) regarding the brassicicene C-type diterpenoids was revised and characterized as the first class of bridgehead double-bond-containing NPs with a bicyclo[6.2.1]undecane carbon skeleton. This study shows the potential of the application of computational prediction methods and biosynthetic logic-based structure elucidation to determining the structure and stability of NPs.

Abstract

The reisolation and structural revision of brassicicene D is described, and inspired us to reassign the core skeletons of brassicicenes C–H, J and K, ranging from dicyclopenta[a,d]cyclooctane to tricyclo[9.2.1.03,7]tetradecane using quantum-chemical predictions and experimental validation strategies. Three novel, highly modified fusicoccanes, brassicicenes L–N, were also isolated from the fungus Alternaria brassicicola, and their structures were unequivocally established by spectroscopic data, ECD calculations, and crystallography. The reassigned structures represent the first class of bridgehead double-bond-containing natural products with a bicyclo[6.2.1]undecane carbon skeleton. Furthermore, their stabilities were first predicted with olefin strain energy calculations. Collectively, these findings extend our view of the application of computational predictions and biosynthetic logic-based structure elucidation to address problems related to the structure and stability of natural products.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.