Phytochemistry p. 133 - 138 (1993)
Update date:2022-07-29
Topics:
Fraga, Braulio M.
Hernandez, Melchor G.
Garcia-Tellado, Fernando
Gonzalez, Pedro
Peralest, Aurea
The microbiological transformation of the diterpene ent-15β,16β-epoxy-14α-hydroxykaurane into ent-14α,15β-dihydroxy-11α,16α-epoxykaurane, ent-7α,14α,15β-trihydroxy-11α,16α-epoxykaurane and ent-7β,14α,15β-trihydroxy-11α,16α-epoxykaurane has been carried out using the fungus Gibberella fujikuroi.The incubation with this fungus of sideroxol (ent-7α,18-dihydroxy-15β,16β-epoxykaurane) gave as main products ent-7α,15β,18-trihydroxy-11α,16α-epoxykaurane and ent-7α,13,18-trihydroxy-15α,16α-epoxykaurane.Some of these compounds were identified as their acetate derivatives.The presence of the 15α,16α-epoxy group in these two substrates inhibits transformations involving oxidation at C-9 and favours the hydroxylation at C-11(β).
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