Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 142, Issue 14, Pages 6511-6515Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c02143
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Funding
- National Science Foundation of China [21632002, 21702011, 21871012]
- Shenzhen Basic Research Program [JCYJ20180302150314340, JCYJ20170818090044432]
- National Key Research and Development Program of China [2018YFC0310905]
- Scientific and Technological Innovation Project by Qingdao National Laboratory for Marine Science and Technology [2015ASKJ02, LMDBKF201802]
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The asymmetric total synthesis of (+)-waihoensene, which has a cis-fused [6,5,5,5] tetracyclic core bearing an angular triquinane, a cis-fused six-membered ring, and four contiguous quaternary carbon atoms, was achieved through a sequence of chemical reactions in a stereochemically well-defined manner. The total synthesis features the following: (1) Cu-catalyzed asymmetric conjugated 1,4-addition; (2) diastereoselective Conia-ene type reaction; (3) diastereoselective intramolecular Pauson-Khand reaction; (4) Ni-catalyzed diastereoselective conjugated 1,4-addition; and (5) radical-initiated intramolecular hydrogen atom transfer (HAT). Control experiments and density functional theory calculations support the proposed HAT process.
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