Phytochemistry p. 717 - 722 (1994)
Update date:2022-08-11
Topics:
Fraga, Braulio M.
Gonzalez, Pedro
Guillermo, Ricardo
Hanson, James R.
Hernandez, Melchor G.
Takahashi, Jacqueline A.
The biotransformation of ent-16β,17-epoxy-7α-hydroxykaurane by Gibberella fujikuroi affords ent-7α,11α,16β,17-tetrahydroxykaurane and ent-7α,9α,16β,17-tetrahydroxykaurane.These results indicated that the presence of the 16α,17-diol group, into which the 16α,17-epoxy is transformed in the medium, imhibits oxidation at C-19 and favours hydroxylation at C-11(β).Incubation of ent-16β,17-epoxykauran-19-oic acid, via the 16α,17-diol, gave the 7-aldehyde of 16α,17-dihydroxy-GA12. - Key words: Gibberella fujikuroi; biotransformations; diterpenes; ent-16β,17-epoxy-7α-hydroxykaurane; ent-16β,17-epoxykauran-19-oic acid; ent-7α,16β,17-trihydroxykaurane; ent-16β,17-dihydroxykauran-19-oic acid.
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