期刊
ORGANIC LETTERS
卷 13, 期 13, 页码 3308-3311出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol200966z
关键词
-
资金
- National Institutes of Health (NIH) [R01 GM081484]
- National Science Foundation [CHE9709183, CHE0741968]
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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