通过使用模型合成和核磁共振计算的综合方法,对海洋基化物 (+) - - 卡利克拉多尔进行总合成和完整的立体化学赋值
Kento Nishikibe1, Momochika Kumagai1,2, Keisuke Nishikawa1
1Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan.
Journal of the American Chemical Society
|February 12, 2026
概括
研究人员首次实现了红藻中具有挑战性的天然产品卡利克拉多尔 (callicladol) 的全合成. 这一突破还确定了其完整的立体化学,并探索了其潜在的抗癌特性.
科学领域:
- 自然产品化学 自然产品化学
- 有机合成 有机合成
- 化学生物学 化学生物学
背景情况:
- 从红藻*Laurencia calliclada*中分离出来的callicladol具有重要的合成和立体化学挑战.
- 它的复杂结构有两个四基环和未解决的绝对配置,迄今为止阻止了总合成.
- 以前使用生物合成规则或计算分析来分配相对立体化学的尝试是不够的.
研究的目的:
- 为了确定callicladol的明确的相对和绝对立体化学.
- 为了实现callicladol的第一个不对称的总合成.
- 为了调查callicladol的生物遗传起源和潜在的生物活性.
主要方法:
- 结合生物合成途径分析 (erythro规则) 与DP4计算分析来分配相对立体化学.
- 使用关键步骤进行非对称的总合成:同时进行佩恩重组/氧化,夏普勒斯-卡茨基非对称环氧化,苏子-米亚拉合,/甲化.
- 合成和天然callicladol的NMR光谱比较用于结构确认.
- 对合成的卡利克拉多和中间体在体外抗癌活性的评估.
主要成果:
- 通过整合生物合成和计算方法来实现对callicladol相对立体化学的明确确定.
- 首次对callicladol的全合成成功完成,证实了它的结构和绝对配置.
- 这项研究提出了一种生物遗传假设,解释了硫醇家族内的不寻常的*threo*配置.
- 合成的callicladol和中间体显示出对癌细胞的增长抑制活性.
结论:
- 卡利克拉多尔的完整立体化学已被最终分配.
- 开发了一种新的合成策略,使得这种复杂的海洋天然产品的首次总合成成为可能.
- 卡利克拉多尔代表了抗癌药物开发的有希望的支架.
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