The microbiological transformation of the diterpene ribenone (3-oxo-ent-13-epi-manoyl oxide) by the fungus Mucor plumbeus has been studied. Epoxidation of the vinyl group constitutes the main reaction and there exists a preference for hydroxylation at C-1(α), C-6(α or β) and C-12(β) and, to a lesser degree, at C-7(α) and C-11(β). Other observed reactions were the reduction of the 3-oxo group to a 3β-alcohol
研究了真菌Mucor plumbeus对二萜
核糖烯酮(3-氧代-ent-13-表-甘
氨酰氧化物)的微
生物转化。
乙烯基的环氧化反应是主要反应,在C-1(α),C-6(α或β)和C-12(β)以及较小的C-7羟基存在羟基化(α)和C-11(β)。其他观察到的反应是将3-氧代基还原为3β-醇和形成具有1,2-双键的代谢产物。在这项工作中,已根据X射线数据修改了二
萜类外毒素A,B和C在C-14处的立体
化学。