Phenyl Ethers from Cultured Lichen Mycobionts of Graphis scripta var. serpentina and G. rikuzensis
作者:Yukiko Takenaka、Takao Tanahashi、Naotaka Nagakura、Nobuo Hamada
DOI:10.1248/cpb.51.794
日期:——
Spore-derived mycobionts of the lichen Graphis scripta var. serpentina and G. rikuzensis were cultivated on a malt-yeast extract medium supplemented with 10% sucrose and their metabolites were investigated. 3,3′-Dihydroxy-5,5′-dimethyldiphenyl ether was isolated from the cultures of the mycobionts of G. scripta var. serpentina, while a new phenyl ether, rikuzenol, along with two known diphenyl ethers, violaceol-I and violaceol-II, were isolated from those of G. rikuzensis. The structure of the new compound was determined by spectroscopic methods. Violaceol-I was chemically synthesized and interconversion between violaceol-I and violaceol-II was proven.
在添加了 10%蔗糖的麦芽-酵母提取物培养基上培养了地衣石墨(Graphis scripta var. serpentina)和地衣石墨(Graphis scripta var. rikuzensis)的孢子分生菌体,并研究了它们的代谢产物。从 G. scripta var. serpentina 的霉菌培养物中分离出了 3,3′-二羟基-5,5′-二甲基二苯醚,而从 G. rikuzensis 的霉菌培养物中分离出了一种新的苯基醚--rikuzenol,以及两种已知的二苯醚--violaceol-I 和 violaceol-II。新化合物的结构是通过光谱方法确定的。对 violaceol-I 进行了化学合成,并证明了 violaceol-I 和 violaceol-II 之间的相互转化。