The Relationship between the CD Cotton Effect and the Absolute Configuration of FD-838 and Its Seven Stereoisomers
作者:Takeshi Yamada、Hiroki Kitada、Tetsuya Kajimoto、Atsushi Numata、Reiko Tanaka
DOI:10.1021/jo100496f
日期:2010.6.18
Three new metabolites having a spiro-heterocyclic γ-lactam core, cephalimysins B−D (1−3), as well as FD-838 (4) were isolated from a culture broth of Aspergillus fumigatus that was originally separated from the marine fish Mugil cephalus. Compounds 1−3 are the diastereomers of 4. Compounds 2 and 3 exhibit an opposite absolute configuration at a spiro carbon to that of other known naturally occurring
具有螺杂环γ内酰胺核心三个新的代谢物,cephalimysins B-d(1 - 3),以及FD-838(4)从培养物肉汤中分离的烟曲霉最初从海洋鱼分离鲻头颅。化合物1 - 3是的非对映体4。化合物2和3在螺碳上表现出与其他已知的天然螺杂环γ-内酰胺相反的绝对构型。此外,我们成功地在四个天然产品(化学转化1 - 4)到他们的差向异构体(1' - 4'在C-8),得到所有的FD-838(立体异构体4具有三个手性中心)。因此,可以明确地确定立体定位中心的绝对构型与这些化合物的CD Cotton效应之间的关系。除1种化合物外,所有化合物均适度抑制了培养的P388和HL-60细胞系的生长。