Enantioselective synthesis of the ABC ring motif of norzoanthamine based on asymmetric Robinson annulation reactions.
Enantioselective synthesis of the ABC ring motif of norzoanthamine based on asymmetric Robinson annulation reactions.
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DOI:
10.1021/ol200966z
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发表时间:
2011-07-01
期刊:
影响因子:
5.2
通讯作者:
Theodorakis, Emmanuel A.
中科院分区:
文献类型:
--
作者:
Nguyen, Thong X.;Dakanali, Marianna;Trzoss, Lynnie;Theodorakis, Emmanuel A.
An enantioselective strategy for the synthesis of tetracyclic motif 5, representing the northern fragment of norzoanthamine, is presented. Key to the strategy is the use of two asymmetric Robinson annulation reactions that produce the tricyclic ABC ring system with excellent stereoselectivity. Further functionalization at the periphery of the C ring produces compound 5 containing six contiguous stereocenters of the natural product.
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