A diversity-oriented synthesis approach to macrocycles via oxidative ring expansion.
A diversity-oriented synthesis approach to macrocycles via oxidative ring expansion.
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DOI:
10.1038/nchembio.911
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发表时间:
2012-03-11
影响因子:
14.8
通讯作者:
Tan, Derek S.
中科院分区:
文献类型:
--
作者:
Kopp, Felix;Stratton, Christopher F.;Akella, Lakshmi B.;Tan, Derek S.
Macrocycles are key structural elements in numerous bioactive small molecules and are attractive targets in the diversity-oriented synthesis of natural product-based libraries. However, efficient and systematic access to diverse collections of macrocycles has proven difficult using classical macrocyclization reactions. To address this problem, we have developed a concise, modular approach to the diversity-oriented synthesis of macrolactones and macrolactams involving oxidative cleavage of a bridging double bond in polycyclic enol ethers and enamines. These substrates are assembled in only 4–5 synthetic steps and undergo ring expansion to afford highly functionalized macrocycles bearing handles for further diversification. In contrast to macrocyclization reactions of corresponding seco-acids, the ring expansion reactions are efficient and insensitive to ring size and stereochemistry, overcoming key limitations of conventional approaches to systematic macrocycle synthesis. Cheminformatic analysis indicates that these macrocycles access regions of chemical space that overlap with natural products, distinct from currently-targeted synthetic drugs.
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通讯作者:
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