Issue 2, 1976

Fungal products. Part XVII. Microbiological hydroxylation of gibberellin A9 and its methyl ester

Abstract

Gibberellin A9(1) is metabolised by re-suspended cultures of Gibberella fujikuroi, mutant B1-41a, principally to gibberellins A20(17) and A40(18). Other metabolites, detected by g.l.c.–mass spectrometry include gibberellin A10(2) and A11(24); two didehydrogibberellin A9 derivatives (12) and (14); 16α,17-dihydro-16,17-dihydroxy-gibberellin A9(26); 3-epi-gibberellin A4(4); and a monohydroxygibberellin A9, possibly (19).

Gibberellin A9 is partially metabolised by cultures of Rhizopus nigricans to give only gibberellin A10(2). Gibberellin A9 methyl ester, however, is converted into the methyl esters of the 16α- and 16β-epimers (26) and (27) of 16,17-dihydro-16,17-dihydroxygibberellin A9, gibberellin A20(17), gibberellin A40(18), gibberellin A45(20), and a monohydroxygibberellin A9, possibly (19).

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1976, 178-183

Fungal products. Part XVII. Microbiological hydroxylation of gibberellin A9 and its methyl ester

J. R. Bearder, V. M. Frydman, P. Gaskin, I. K. Hatton, W. E. Harvey, J. MacMillan and B. O. Phinney, J. Chem. Soc., Perkin Trans. 1, 1976, 178 DOI: 10.1039/P19760000178

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