从 Aspergillus violaceofuscus Gasperini 中分离出的细胞毒性烷基化苯酚 violaceoid D 的合成和构效关系。
摘要:
实现了从 Aspergillus violaceofuscus Gasperini 的培养液中分离出的细胞毒性酚类化合物 violaceoid D 的对映体选择性合成。全合成涉及通过 Sharpless 不对称二羟基化,然后进行 Smiles 重排,立体选择性地构建紫罗兰酮 D 的立体异构中心。由比旋光值确定天然紫罗兰素D的绝对构型为R。合成的紫罗兰酮 D 及其类似物针对两种人类癌细胞系 Jurkat 和 HCT116 的细胞毒性进行了评估。因为紫罗兰酮 D 的对映异构体没有表现出细胞毒性,所以紫罗兰酮 D 选择性地结合特定靶分子(例如癌细胞中的蛋白质)是合理的。
Synthesis and plant growth inhibitory activity of both enantiomers of pyricuol, a phytotoxin isolated from rice blast disease fungus Magnaporthe grisea
Both enantiomers and racemate of pyricuol, a phytotoxin isolated from the riceblast disease fungus, Magnaporthegrisea, have been synthesized by using Stille coupling and [2,3]-Wittig rearrangement reactions as the key steps. Both enantiomers induced dark necrotic lesions on rice leaves almost equally, but did not affect the growth of rice second leaf sheath and the germination of lettuce. Only natural