期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 38, 页码 15135-15144出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b06355
关键词
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资金
- National Institutes of Health (NIH) [R35 GM 118173]
- Boston University (BU)
- National Science Foundation (NSF) [CHE-0619339, CHE-0443618]
Development of a synthetic route to the oxaphenalenone (OP) natural products neonectrolides B-E is described. The synthesis relies on gold-catalyzed 6-endo-dighydroarylation of an unusual enynol substrate as well as a one-pot Rieche formylation/cyclization/deprotection sequence to efficiently construct the tricyclic oxaphenalenone framework in the form of a masked ortho-quinone methide (o-QM). A tandem cycloisomerization/[4 + 2] cycloaddition strategy was employed to quickly construct molecules resembling the neonectrolides. The tricyclic OP natural product SF226 could be converted to corymbiferan lactone E and a related masked o-QM. Our study culminates with the application of the tandem reaction sequence to syntheses of neonectrolides B-E as well as previously unreported exo-diastereomers.
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