1
|
Zhou L, Yang LS, Wang L, Liu HD, Gao M, Chen FJ, Yang J, Li QJ, Yang XS. Cinnamigones A-C, three highly oxidized guaiane-type sesquiterpenes with neuroprotective activity from Cinnamomum migao. PHYTOCHEMISTRY 2023; 212:113728. [PMID: 37211335 DOI: 10.1016/j.phytochem.2023.113728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/11/2023] [Accepted: 05/15/2023] [Indexed: 05/23/2023]
Abstract
Cinnamigones A-C, three undescribed highly oxidized guaiane-type sesquiterpenes were isolated from the fruits of Cinnamomum migao. Cinnamigone A (1), structurally artemisinin-like, is a natural 1,2,4-trioxane caged endoperoxide with an unprecedented tetracyclic 6/6/7/5 ring system. Compounds 2-3 are classic guaiane sesquiterpene featuring different epoxy units. Guaiol (4) is considered to be the precursor of 1-3 in the biosynthesis pathway hypothesis. The planar structures and configurations of cinnamigones A-C were elucidated by spectral analysis, HRESIMS, X-ray crystallography and ECD calculations. Evaluation of the neuroprotective activity of 1-3 on N-methyl-ᴅaspartate (NMDA) toxicity was demonstrated that compounds 1-2 exhibited moderate neuroprotective activity against NMDA-induced neurotoxicity.
Collapse
Affiliation(s)
- Lang Zhou
- School of Basic Medicine / State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Li-Shou Yang
- School of Basic Medicine / State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Li Wang
- Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Hua-Dan Liu
- Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Ming Gao
- Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Fa-Ju Chen
- School of Basic Medicine / State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Juan Yang
- Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Qi-Ji Li
- School of Basic Medicine / State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China.
| | - Xiao-Sheng Yang
- School of Basic Medicine / State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China; Engineering Research Center of Natural Product Efficient Utilization in Guizhou, Natural Products Research Center of Guizhou Province, Guiyang 550014, China.
| |
Collapse
|
2
|
Grant PS, Meyrelles R, Gajsek O, Niederacher G, Maryasin B, Maulide N. Biomimetic Cationic Cyclopropanation Enables an Efficient Chemoenzymatic Synthesis of 6,8-Cycloeudesmanes. J Am Chem Soc 2023; 145:5855-5863. [PMID: 36854118 PMCID: PMC10021018 DOI: 10.1021/jacs.2c13116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
Cationic cyclopropanation involves the γ-elimination at carbocations to form a new σ-C-C bond through proton loss. While exceedingly rare in bulk solution, it is recognized as one of the main biosynthetic cyclopropanation pathways. Despite the rich history of bioinspired synthetic chemistry, cationic cyclopropanation has not been appropriated for the synthetic toolbox, likely due to the preference of carbocations to undergo competing E1 β-elimination pathways. Here, we present an in-depth synthetic and computational study of cationic cyclopropanation, focusing on the 6,8-cycloeudesmanes as a platform for this investigation. We were able to apply biomimetic cationic cyclopropanation to the synthesis of several 6,8-cycloeudesmanes and non-natural analogues─in doing so, we showcase the power of this transformation in the preparation of complex cyclopropanes.
Collapse
Affiliation(s)
- Phillip S Grant
- Institute of Organic Chemistry, University of Vienna, Vienna 1090, Austria
| | - Ricardo Meyrelles
- Institute of Organic Chemistry, University of Vienna, Vienna 1090, Austria.,Institute of Theoretical Chemistry, University of Vienna, Vienna 1090, Austria.,Vienna Doctoral School in Chemistry, University of Vienna, Vienna 1090, Austria
| | - Oliver Gajsek
- Institute of Biological Chemistry, University of Vienna, Vienna 1090, Austria.,Vienna Doctoral School in Chemistry, University of Vienna, Vienna 1090, Austria
| | - Gerhard Niederacher
- Institute of Biological Chemistry, University of Vienna, Vienna 1090, Austria
| | - Boris Maryasin
- Institute of Organic Chemistry, University of Vienna, Vienna 1090, Austria.,Institute of Theoretical Chemistry, University of Vienna, Vienna 1090, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Vienna 1090, Austria
| |
Collapse
|
3
|
Hydroxy-octadecenoic acids instead of phorbol esters are responsible for the Jatropha curcas kernel cake's toxicity. Commun Biol 2020; 3:228. [PMID: 32385384 PMCID: PMC7210109 DOI: 10.1038/s42003-020-0919-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/25/2020] [Indexed: 11/25/2022] Open
Abstract
The toxic kernel cake of Jatropha curcas (KCakeJ) is an emerging health and environmental concern. Although phorbol esters are widely recognized as the major toxin of KCakeJ, convincing evidence is absent. Here, we show that rather than phorbol esters an isomeric mixture of 11-hydroxy-9E-octadecenoic acid, 12-hydroxy-10E-octadecenoic acid and 12-hydroxy-10Z-octadecenoic acid (hydroxy-octadecenoic acids, molecular formula C18H34O3) is the major toxic component. The toxicities of hydroxy-octadecenoic acids on experimental animals, e.g. acute lethality, causing inflammation, pulmonary hemorrhage and thrombi, allergies, diarrhea and abortion, are consistent with those on human/animals caused by Jatropha seed and/or KCakeJ. The hydroxyl group and the double bond are essential for hydroxy-octadecenoic acids’ toxicity. The main pathway of the toxicity mechanism includes down-regulating UCP3 gene expression, promoting ROS production, thus activating CD62P expression (platelet activation) and mast cell degranulation. The identification of the major toxin of KCakeJ lays a foundation for establishing an environmentally friendly Jatropha biofuel industry. Wang et al. report that an isomeric mixture of 3 hydroxy-octadecenoic acids, instead of widely recognised phorbol esters, are the major toxic component of Jatropha curcas kernel cake. They test its effects on animal models and also attempt to elucidate the mechanism behind the toxicity, with a goal to help establish an environmentally friendly Jatropha biofuel industry.
Collapse
|
4
|
The genus Jatropha (Euphorbiaceae): A review on secondary chemical metabolites and biological aspects. Chem Biol Interact 2020; 318:108976. [PMID: 32035864 DOI: 10.1016/j.cbi.2020.108976] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 01/28/2020] [Accepted: 02/05/2020] [Indexed: 11/23/2022]
Abstract
The genus Jatropha belongs to the Euphorbiaceae family and has about 175 species. Originally from tropical America, the Jatropha genus can be found all over the tropics and subtropics of Asia and Africa. Jatropha species are recognized to be important sources of secondary metabolites with a broad spectrum of biological functions. Extracts and isolated compounds from species of this genus have been known to have properties of cytotoxicity, antimicrobial, antifungal, anti-inflammatory, antioxidant, insecticidal, larvicidal, inhibition AChE, and toxicity activities. Investigations on the chemical aspects of the genus Jatropha have led to the identification of cyclic peptides, lignans, flavonoids, coumarins, alkaloids, eudesmenoic acids, and mainly terpenes. In this review, we provide a comprehensive picture of the phytochemical and biological characteristics of Jatropha species. The information gathered and approached in this paper might support the planning and discussion of future studies on the topic.
Collapse
|
5
|
Wisetsai A, Lekphrom R, Schevenels FT. A novel cyclohexenone from Trachyspermum roxburghianum. Nat Prod Res 2018; 32:2499-2504. [DOI: 10.1080/14786419.2017.1423299] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Awat Wisetsai
- Faculty of Science, Natural Products Research Unit, Department of Chemistry, and Center for Innovation in Chemistry, Khon Kaen University, Khon Kaen, Thailand
| | - Ratsami Lekphrom
- Faculty of Science, Natural Products Research Unit, Department of Chemistry, and Center for Innovation in Chemistry, Khon Kaen University, Khon Kaen, Thailand
| | - Florian T. Schevenels
- Faculty of Science, Natural Products Research Unit, Department of Chemistry, and Center for Innovation in Chemistry, Khon Kaen University, Khon Kaen, Thailand
| |
Collapse
|
6
|
Liu JQ, Xu Y, Xiao Q, Huang JD, Ma JJ, Lian CL, Huang MY, Du ZB, Wang CF. Dimericursones A and B: two unprecedented hexacyclic dimeric diterpenoids from the root barks of Jatropha curcas. Org Biomol Chem 2018; 16:8305-8310. [DOI: 10.1039/c8ob02082e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Two unprecedented hexacyclic dimeric diterpenoids from Jatropha curcas and 2 showed significant NO inhibitory activity with IC50 values of 5.65 μM.
Collapse
Affiliation(s)
- Jie-Qing Liu
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Ying Xu
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Qin Xiao
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Jin-Di Huang
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Jun-Jie Ma
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Chen-Lei Lian
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Mei-Ying Huang
- School of Medicine
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Zhen-bo Du
- School of Materials Science and Engeering
- Huaqiao University
- Quanzhou 362021
- P. R. China
| | - Cui-Fang Wang
- College of Oceanology and Food Science
- Quanzhou Normal University
- Quanzhou 362000
- P. R. China
| |
Collapse
|
7
|
New eudesmenoic acid methyl esters from the seed oil of Jatropha curcas. Fitoterapia 2013; 89:278-84. [DOI: 10.1016/j.fitote.2013.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 06/14/2013] [Accepted: 06/20/2013] [Indexed: 11/20/2022]
|