作者:Hui Liu、Yuqing Liu、Zhuo Wang、Xiangyou Xing、Anita R. Maguire、Hendrik Luesch、Hui Zhang、Zhengshuang Xu、Tao Ye
DOI:10.1002/chem.201203667
日期:2013.5.17
investigations into the synthesis of grassypeptolide A (1) in 17 linear steps with an overall yield of 11.3 %. In particular, this work features the late‐stage introduction of sensitive bis(thiazoline) heterocycles and 31‐membered macrocyclization conducted at the sterically congested secondary amide site in superb conversion (72 % yield). Biological evaluation indicated that grassypeptolide A significantly
在本文中,我们全面描述了草皮肽A(1)分17线性步长,总收率为11.3%。特别是,这项工作的特点是后期引入了敏感的双(噻唑啉)杂环和在空间拥挤的仲酰胺位点进行了出色的转化(72%收率)的31元大环化。生物学评估表明,草肽内酯A以剂量依赖的方式显着抑制癌细胞的增殖。它诱导癌细胞凋亡,这与聚(ADP-核糖)聚合酶(PARP)的切割增加和bcl-2和bcl-xL的表达降低有关。此外,草肽A还通过增加G1期的细胞和减少S期和G2期的细胞而引起细胞周期的重新分布。另外,细胞周期停滞与细胞周期蛋白D的下调以及p27和p21的上调相关。