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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Catalysis-based enantioselective total synthesis of the macrocyclic spermidine alkaloid isooncinotine
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Catalysis-based enantioselective total synthesis of the macrocyclic spermidine alkaloid isooncinotine

机译:大环亚精胺生物碱异西诺丁碱的催化对映选择性全合成

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摘要

A concise and efficient total synthesis of the spermidine alkaloid (-)-isooncinotine (1) incorporating a 22-membered lactam ring is outlined. The approach is largely catalysis-based, involving a selective iron-catalyzed alkyl-aryl cross-coupling reaction of a difunctionalized pyridine substrate, a heterogeneous asymmetric hydrogenation step to set the chiral center of the target, and a highly integrated ring-closing metathesis/hydrogenation sequence to forge the saturated macrocyclic edifice in a single operation.
机译:概述了一个精简而有效的全合成亚精胺生物碱(-)-异西诺丁碱(1)的22元内酰胺环。该方法主要是基于催化的,涉及双官能化吡啶底物的选择性铁催化的烷基-芳基交叉偶联反应,设置目标手性中心的非均相不对称氢化步骤以及高度集成的闭环复分解/一次加氢即可形成饱和的大环大厦。

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