Fully Stereocontrolled Total Syntheses of the Prostacyclin Analogues 16<i>S</i>-Iloprost and 16<i>S</i>-3-Oxa-Iloprost by a Common Route, Using Alkenylcopper-Azoalkene Conjugate Addition, Asymmetric Olefination, and Allylic Alkylation
作者:Guido J. Kramp、Mikhail Kim、Hans-Joachim Gais、Cornelia Vermeeren
DOI:10.1021/ja0558037
日期:2005.12.1
stereocontrolled total syntheses of 16S-iloprost (16S-2), the most active component of the drugs Ilomedin and Ventavis, and of 16S-3-oxa-iloprost (16S-3), a close analogue of 16S-2 having the potential for a high oral activity, by a new and common route. The key steps of this route are (1) the establishment of the complete C13-C20 omega side chain of the target molecules through a stereoselective conjugate addition
在本文中,我们描述了 16S-伊洛前列素 (16S-2)(药物 Ilomedin 和 Ventavis 中最活跃的成分)和 16S-3-氧杂-伊洛前列素(16S-3)(16S 的近似类似物)的完全立体控制的全合成-2 具有通过新的和通用的途径进行高口腔活性的潜力。该路线的关键步骤是(1)通过将烯基铜衍生物9立体选择性共轭加成到双环C6-C12偶氮烯烃10并形成腙8,建立目标分子的完整C13-C20ω侧链,( 2) 酮 7 与手性磷酸磷酸酯 39 的非对映选择性烯化,以及 (3) 烯丙基乙酸酯 43 与铜酸盐 42 的区域和立体选择性烷基化。这些措施允许 16S-2 的 5E,15S,16S-立体选择性合成和 16S-3,以前没有实现的目标。如前所述,通过使用对映选择性去质子化作为关键步骤,从非手性双环 C6-C12 酮 11 获得偶氮烯烃 10。欧米茄侧链结构单元 9 的 C16 处的构型