Total Synthesis and Structural Confirmation of Chlorodysinosin A
作者:Stephen Hanessian、Juan R. Del Valle、Yafeng Xue、Niklas Blomberg
DOI:10.1021/ja0625834
日期:2006.8.1
The first enantiocontrolled total synthesis of the marine sponge metabolite chlorodysinosin A is described. The structure and absoluteconfiguration are identical to those of dysinosin A except for the presence of a novel 2S,3R-3-chloroleucine residue in the former. A concise stereocontrolled synthesis of the new chlorine-containing amino acid fragment was developed. An X-ray cocrystal structure of
描述了海洋海绵代谢物氯化肌球蛋白 A 的第一个对映体控制的全合成。除了在前者中存在新的 2S,3R-3-氯亮氨酸残基外,其结构和绝对构型与肌胞苷 A 相同。开发了新的含氯氨基酸片段的简洁立体控制合成。合成氯肌球蛋白 A 与凝血酶的 X 射线共晶结构证实了通过全合成实现的结构和构型分配。在天然产物铜绿素家族中,氯肌球蛋白 A 是丝氨酸蛋白酶凝血酶、凝血酶因子 VIIa 和因子 Xa 的最有效抑制剂,这些酶是导致人类血小板聚集和纤维蛋白网形成过程中的关键酶。
Total Synthesis and Structural Revision of the Presumed Aeruginosins 205A and B
作者:Stephen Hanessian、Xiaotian Wang、Karolina Ersmark、Juan R. Del Valle、Ellen Klegraf
DOI:10.1021/ol901702k
日期:2009.9.17
A stereoselective synthesis of enantiopure aeruginosin 205B aglycon confirms the presence of a (3R,2S)-3-chloroleucine amide residue and a (6R)-hydroxy (4aR,7aS)-octahydroindole-(2S)-2-carboxamide (Choi) subunit instead of a 6-chloro-substituted core (Ccoi). Enzyme inhibitory tests against thrombin revealed an IC50 of 0.31 μM. The totalsynthesis of the presumed aeruginosin 205B shows that the α-d-xylopyranosyl