欧甲基的总合成
Junichi Taguchi1, Shintaro Fukaya1, Haruka Fujino1
1Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
科学家们首次完成了欧二甲的全合成, 这种复杂的分子
科学领域:
- 有机化学
- 自然产品合成
- 医学化学
背景情况:
- 尤福比洛伊德A (1) 是一种具有强烈抗炎作用的罕见的先二甲基.
- 它的复杂四环结构 (ABCD环) 具有11个立体中心和7个氧基,这构成了重要的合成挑战.
- 之前没有报告Euphorbialoid A或相关的前素的合成.
研究的目的:
- 实现第一个euphorbialoidA的综合.
- 开发一种复杂的先素二胺的新合成策略.
- 探索密集氧化的合成的新见解.
主要方法:
- 采用了两阶段的合成策略.
- 第1阶段涉及Pt-doped TiO2-催化基合,Pd-催化脱碳化非对称合,并进行Co-mediated Pauson-Khand反应以组装ABCD环.
- 第二阶段专注于使用中间体的3D结构信息进行立体选择性A环制造和位点选择性化.
主要成果:
- 第一次Euphorbialoid A的总合成是在35步最长的线性序列中完成的.
- 该战略成功构建了复杂的ABCD环系统并安装了功能组.
- 合成表明了反应序列编排和循环保护组的重要性.
结论:
- 开发的策略为合成欧二甲和其他前素提供了可行的途径.
- 这项工作为复杂的,含氧密度高的基与多种基的合成提供了宝贵的见解.
- 这种成功的合成为进一步探索前素化学和潜在应用开辟了道路.
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