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首页> 外文期刊>Chemistry: A European journal >Total synthesis and biological evaluation of grassypeptolide A
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Total synthesis and biological evaluation of grassypeptolide A

机译：草pe内酯A的全合成及生物评价

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Herein, we describe in full our 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 inhibited cancer cell proliferation in a dose-dependent manner. It induced cancer cell apoptosis, which was associated with increased cleavage of poly(ADP-ribose) polymerase (PARP) and decreased expression of bcl-2 and bcl-xL. Furthermore, grassypeptolide A also caused cell cycle redistribution by increasing cells in the G1 phase and decreasing cells in the S and G2 phases. In addition, cell cycle arrest was correlated with downregulation of cyclin D and upregulation of p27 and p21. Cytotoxic activity: Synthesis of grassypeptolide A, an anticancer marine cyclodepsipeptide, in 17 linear steps with an overall yield of 11.3 % is described (see figure). Subsequent biological evaluation indicated that grassypeptolide A significantly inhibited cancer-cell proliferation in a dose-dependent manner.
机译：在本文中，我们以17个线性步骤完整描述了草皮肽A（1）的合成研究，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grass内酯A以剂量依赖性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）的切割增加以及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。细胞毒性活性：描述了17个线性步骤中草甘肽内酯A（一种抗癌海洋环二肽）的合成，总产率为11.3％（见图）。随后的生物学评估表明草grass内酯A以剂量依赖性方式显着抑制癌细胞的增殖。

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