Biotransformation of ent -13- epi -manoyl oxides difunctionalized at C-3 and C-12 by filamentous fungi
作者:Andrés Garcı́a-Granados、Antonia Fernández、Marı́a C. Gutiérrez、Antonio Martı́nez、Raquel Quirós、Francisco Rivas、José M. Arias
DOI:10.1016/j.phytochem.2003.09.017
日期:2004.1
Biotransformation of ent-3beta,12alpha-dihydroxy-13-epi-manoyl oxide with Fusarium moniliforme gave the regioselective oxidation of the hydroxyl group at C-3 and the ent-7beta-hydroxylation. The action of Gliocladium roseum in the 3,12-diketoderivative originated monohydroxylations at C-1 and C-7, both by the ent-beta face, while Rhizopus nigricans produced hydroxylation at C-7 or C-18, epoxidation
ent-3beta,12alpha-dihydroxy-13-epi-manoyloxide 与 Fusarium moniliforme 的生物转化使区域选择性氧化在 C-3 和 ent-7beta-羟基化的羟基。Gliocladium roseum 在 3,12-二酮衍生物中的作用源自 C-1 和 C-7 的单羟基化,均通过 ent-beta 面,而黑根霉在 C-7 或 C-18 处产生羟基化,双键环氧化,C-3 处酮基的还原,以及 C-2 处生物羟基化/双键环氧化和 C-7 处羟基化/C-3 处酮基还原的组合作用。在 ent-3-hydroxy-12-keto 差向异构体中,G.roseum 起源于 C-1 和 C-7 处的单羟基化,而 R. nigricans 起源于 C-3 处的氧化作为主要转化,双键的环氧化和 C 处的羟基化-2. 最后,