Journal
ORGANIC LETTERS
Volume 16, Issue 10, Pages 2784-2786Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol501050s
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Funding
- NSFC [21072083, 21272104]
- 973 Program [2010CB833203]
- program for Changjiang Scholars and Innovative Research Team in University [PCSIRT: IRT1138]
- fund for the Doctoral Program of Higher Education of China [20110211110009]
- Fundamental Research Funds for the Central Universities [lzujbky-2012-56, lzujbky-2013-ct02]
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The enantioselective syntheses of (-)-spirooliganones A and B have been accomplished in eight steps from commercially available starting materials. Noteworthy transformations include a three-component hetero-Diels-Alder cycloaddition to construct the tetracyclic core of spirooliganones, a Sharpless asymmetric dihydroxylation, and a tandem oxidative dearomatization/cyclization to build the oxa-spiro cyclohexadienone skeleton. The straightforward syntheses were performed without protecting groups.
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