Formation of 2,3-seco-acids in the biotransformation of the diterpene ribenone by Gibberella fujikuroi
作者:Braulio M. Fraga、Pedro González、Melchor G. Hernández、Sergio Suárez
DOI:10.1016/s0040-4020(98)01190-9
日期:1999.2
The biotransformation of ribenone (ent-3-oxo-13-epi-manoyl oxide) (4) by the fungus Gibberella fujikuroi led to compounds hydroxylated at C-l(alpha), C-6(beta), C-11(beta) or C-12(beta), in addition to the 2,3-seco diacids 15, 17 and 19. (C) 1999 Elsevier Science Ltd. All rights reserved.
Seco-labdane type diterpenes from Excoecaria agallocha
Labdane-type diterpenes, called excoecarins S, T1, and T2 were isolated from the resinous wood of Excoecaria agallocha, along with three known compounds, ent-12-oxo-2,3-secobeyer-15-ene-2,3-dioic acid, agallochin H, and ent-15-epoxy-beyerane-3alpha-ol. Their structures were elucidated on the basis of spectroscopic data, chemical evidence, and X-ray analysis. (C) 2003 Elsevier Ltd. All rights reserved.