reniochalistatin B was found to have potent activity against several cancer cell lines not shown by the cyclic reniochalistatin B counterpart. In addition, linear reniochalistatin B was found to have antitubercular activity (IC50=1.4 μm). Inverso‐E possesses increasing cytotoxicity against the HeLa and LNCaP cell lines after simple alternation of the sequence of amino acids in reniochalistatin E. The
adopted for the synthesis of proline-containing cyclic pentapeptide 2 and total synthesis of naturally occurring cyclic heptapeptide Reniochalistatin B 3. For the synthesis of 3, both divergent and convergent strategies were used to improve the overall yield from 12 to 25%. Different N and C terminal modified linear analogs and congeners of 2 and 3 were synthesized. Both cyclic peptides 2 and 3 and their
摘要 采用液相法合成含脯氨酸的环状五肽 2 和天然存在的环状七肽 Reniochalistatin B 3 的全合成。对于 3 的合成,采用发散和收敛策略,将总产率从 12 提高到25%。合成了不同的 N 和 C 末端修饰的线性类似物以及 2 和 3 的同源物。环肽 2 和 3 及其线性类似物/同源物均评估了对 HeLa 细胞系的抗癌活性,其中具有 N 末端保护的六氟异丙基氨基甲酸酯 (HFIPC) 的五肽 2 h 和六肽 3n 有趣地显示出更高的细胞毒性,IC50 为2.73 和 4.3 µM,分别与其 Boc 保护的类似物 2a (IC50 20 µM) 和 3c (IC50 38.51 µM) 和环肽 2 (> 100 µM) 和 3 (47 µM)。这些结果通过集落形成和伤口愈合试验等生物学实验得到了进一步验证。图形概要