Antifungal activity against anthracnose-causing species of homopterocarpin derivatives.
| Autor: | Martinez J; Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, 59-110, Medellín, Colombia., Ramírez C; Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, 59-110, Medellín, Colombia., Gil J; Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias Agrarias, Departamento de Ingeniería Agrícola y Alimentos, Carrera 65, 59-110, Medellín, Colombia., Quiñones W; Grupo de Química Orgánica de Productos Naturales, Instituto de Química, Universidad de Antioquia, Calle 70, Medellín P.O. Box 1226, Colombia., Durango D; Universidad Nacional de Colombia-Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, 59-110, Medellín, Colombia. |
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| Jazyk: | angličtina |
| Zdroj: | Heliyon [Heliyon] 2023 Jan 28; Vol. 9 (2), pp. e13082. Date of Electronic Publication: 2023 Jan 28 (Print Publication: 2023). |
| DOI: | 10.1016/j.heliyon.2023.e13082 |
| Abstrakt: | Derivatives of 3,9-dimethoxypterocarpan ( 1 , homopterocarpin) were prepared by nitration, amination, and oxidation reactions, among others, and their antifungal activity was evaluated against the phytopathogenic fungi Colletotrichum gloeosporioides and C. lindemuthianum . Derivatives were purified by chromatographic techniques and identified by nuclear magnetic resonance spectroscopy. Eight derivatives were obtained from 1 corresponding to 3,9-dimethoxy-8-nitropterocarpan ( 2 ), 3,9-dimethoxy-2,8-dinitropterocarpan ( 3 ), 3,9-dimethoxy-2,8,10-trinitropterocarpan ( 4 ), 2,8-diamino-3,9-dimethoxypterocarpan ( 5 ), 3,9-dimethylcoumestan ( 6 ), medicarpin ( 7 ), 2'-hydroxy-4-(2-hydroxyethylsulfanyl)-7,4'-dimethoxyisoflavan ( 8 ), and 4-(2-hydroxyethylsulfanyl)-7,2',4'-trimethoxyisoflavan ( 9 ). The in vitro antifungal activity of the derivatives was determined at concentrations between 35 and 704 μM. Compounds 7 and 8 at 704 μM, showed an inhibition of radial growth and spore germination close to 100%, exceeding that found for the starting compound 1 , which was 46%. Growth inhibition assays were also performed for the derivative 8 on papaya fruits ( Carica papaya L. cv. Hawaiana) and mango ( Mangifera indica L. cv. Hilacha) infected with C. gloeosporioides . Compound 8 showed fungal growth inhibition in fruits higher than that found for 1 and thymol (a recognized natural antifungal), under the same conditions. In general, derivatives that exhibited greater antifungal activity correspond to the compounds containing hydroxyl groups in the structure. Some of the compounds obtained could be considered promising for the control of phytopathogenic fungi. Competing Interests: The authors declare no competing interests. (© 2023 The Authors.) |
| Databáze: | MEDLINE |
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