1. Two ambuic acid dimers derived from homo-endo Diels-Alder reaction from Pestalotiopsis versicolor.
- Author
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Li, Dan-Yi, Zhang, Xiao-Ling, and Li, Zhan-Lin
- Subjects
X-rays ,SPECTROPHOTOMETERS ,PHARMACEUTICAL technology ,FUNGI ,NUCLEAR magnetic resonance spectroscopy ,HYDROCARBONS ,POLYMERS ,CARBOXYLIC acids ,RESEARCH funding ,MOLECULAR structure ,PHARMACEUTICAL chemistry ,CHROMATOGRAPHIC analysis - Abstract
Two new dimers of ambuic acid, pestaloversicoloric acids A (1) and B (2), and a known derivative, 13(S)-hydroxyambuic acid (3), were isolated from the static fermentation product of Pestalotiopsis versicolor. The structural identification was accomplished via analyses on the data of HR-MS, 1 D and 2 D NMR, and ECD. Different from the well-known exo-type dimer, torreyanic acid, compounds 1 and 2 represent the first example of endo-type product derived from the intermolecular Diels-Alder reaction of two molecules of ambuic acid derivative with the identical absolute stereochemistry. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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