The biotransformation of two ent-15B,16B-epoxy-kaurane derivatives by Gibberella fujikuroi
The microbiological transformation of the diterpene ent-15B,16B-epoxy-14a-hydroxykaurane into ent-14a,15B-dihydroxy-11a,16a-epoxykaurane, ent-7a,14a,15B-trihydroxy-11a,16a-epoxykaurane and ent-7B,14a,15B-trihydroxy-11a,16a-epoxykaurane has been carried out using the fungus Gibberella fujikuroi. The...
| Autores: | , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 1993 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/21860 |
| Acesso em linha: | http://hdl.handle.net/10261/21860 |
| Access Level: | acceso abierto |
| Palavra-chave: | Gibberella fujikuroi Microbiological transformations Diterpenes ent-15B,16B-epoxy-14a-hydroxykaurane Sideroxol |
| Resumo: | The microbiological transformation of the diterpene ent-15B,16B-epoxy-14a-hydroxykaurane into ent-14a,15B-dihydroxy-11a,16a-epoxykaurane, ent-7a,14a,15B-trihydroxy-11a,16a-epoxykaurane and ent-7B,14a,15B-trihydroxy-11a,16a-epoxykaurane has been carried out using the fungus Gibberella fujikuroi. The incubation with this fungus of sideroxol (ent-7a,18-dihydroxy-15B,16B-epoxykaurane) gave as main products ent-7a,15B,18-trihydroxy-11a,16a-epoxykaurane and ent-7a,13,18-trihydroxy-15a,16a-epoxykaurane. Some of these compounds were identified as their acetate derivatives. The presence of the 15a,16a-epoxy group in these two substrates inhibits transformations involving oxidation at C-19 and favours the hydroxylation at C-11(B). |
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