alcohol was crucial for the final deprotection step. Our synthesis also led to a hypothesis that pestalotioprolide D might be an artifact of 7-O-methylnigrosporolide. The cytotoxic activities of the two synthetic compounds against six human cancer cell lines were evaluated. Synthetic pestalotioprolide D showed more potent cytotoxic activity than 7-O-methylnigrosporolide against all the cancer cell
从 ( S )-环氧
丙烷和 ( S )-
苄基缩水甘油醚开始,7- O-甲基黑孢内酯和pestalotioprolide D的聚合全合成已通过 17 个线性步骤完成,总产率分别为 1.7% 和 2.6%。我们的合成利用
乙炔化物加成和椎名大环内酯化组装大环、Lindlar 还原和 Wittig 和 Still-Gennari 烯化来构建三个烯烃基团,以及 Jacobsen
水解动力学拆分来安装立体中心。C-4 醇的甲
硅烷基保护基团的选择对于最后的脱保护步骤至关重要。我们的合成还导致了一个假设,即pestalotioprolide D 可能是 7- O的产物-甲基黑孢内酯。评估了两种合成化合物对六种人类癌
细胞系的细胞毒活性。合成的pestalotioprolide D对所有测试的癌
细胞系都显示出比7 - O-甲基黑孢子内酯更有效的细胞毒活性,并且SiHa 宫颈癌
细胞系对这两种合成化合物最敏感。