Abstract
Background: Eusiderin A is a neolignan derivate, which makes up the majority of the secondary metabolite of Eusideroxylon zwageri. It has been reported as a potent biopesticide and antifungal agent. Previous studies on the oxidation of terminal methylene of the allylic chain in Eusiderin A have been able to produce primary alcohol, pinacol, and an aldehyde which demonstrated strong activity against plant pathogenic fungi, therefore activity against dermal fungi needs to be studied.
Objective: The current study aims to improve the hydrophilicity of Eusiderin A via oxidation of the allylic chain in order to derive a potent antifungal property.
Methods: Transformation of Eusiderin A has been achieved by using the Wacker Oxidation Method in combination with the α-Hydroxylation-Ketone Method to produce 7,3’-epoxy-8,4’-oxyneolignane-1’- carboxylic acid. The structure of the 7,3’-epoxy-8,4’-oxyneolignane-1’-carboxylic acid was identified from spectroscopy data. The in vitro antifungal activity study was performed using the paper disc diffusion method against Trichophyton mentagrophytes.
Results: New molecule of natural Eusiderin A through the oxidation of the allylic chain to increase the hydrophilicity of Eusiderin A has been designed. Based on the observed UV, IR, 1H and 13C-NMR, and MS spectra, it can be stated that the 7,3’-epoxy-8,4’-oxyneolignane-1’-carboxylic acid has been formed. At a concentration of 50 ppm, this compound showed antifungal activity against Trichophyton mentagrophytes.
Conclusion: It can be concluded that the 7,3’-epoxy-8,4’-oxyneolignane-1’-carboxylic acid is a potent antifungal agent as it is able to inhibit the Trichophyton mentagrophytes colonies growth.
Keywords: Antifungal, eusiderin A, 7, 3’-epoxy-8, 4’-oxyneolignane-1’-carboxylic acid, oxidation, Trichophyton mentagrophytes.
Graphical Abstract
[http://dx.doi.org/10.1039/jr9600004732]
[http://dx.doi.org/10.3109/13693786.2013.811552] [PMID: 23859078]
[http://dx.doi.org/10.3390/ijms20040848] [PMID: 30781401]
[http://dx.doi.org/10.1093/mmy/myv071] [PMID: 26333355]
[http://dx.doi.org/10.1006/pmpp.2001.0355]
[http://dx.doi.org/10.1128/EC.00277-06] [PMID: 17041185]
[http://dx.doi.org/10.1021/jo00296a067]
[http://dx.doi.org/10.1007/s11144-016-1123-5]
[http://dx.doi.org/10.1002/ajoc.201700337]
[http://dx.doi.org/10.1002/anie.201707006] [PMID: 28815838]
[http://dx.doi.org/10.1002/chem.201702651] [PMID: 28675764]
[http://dx.doi.org/10.1002/ejic.201700931]
[http://dx.doi.org/10.1002/ejoc.201701314] [PMID: 29398954]
[http://dx.doi.org/10.1021/ol5037387] [PMID: 25650782]
[http://dx.doi.org/10.1039/C6OB00036C] [PMID: 26867154]
[http://dx.doi.org/10.1002/cctc.201200066]
[http://dx.doi.org/10.1002/ange.201404712]
[http://dx.doi.org/10.1021/ja411749k] [PMID: 24410719]
[http://dx.doi.org/10.1021/ol500218p] [PMID: 24606159]
[http://dx.doi.org/10.1002/anie.201301611] [PMID: 23610030]
[http://dx.doi.org/10.1002/anie.201209541] [PMID: 23325587]
[http://dx.doi.org/10.1002/anie.201306756] [PMID: 24039135]
[http://dx.doi.org/10.1002/cssc.201701016] [PMID: 28834377]
[http://dx.doi.org/10.1111/j.1365-2672.2004.02417.x] [PMID: 15546420]
[http://dx.doi.org/10.1016/j.imr.2015.01.003] [PMID: 28664116]