Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 42, Pages 14723-14727Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503118
Keywords
cyclization; organocatalysis; photocatalysis; polyenes; radical reactions
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Funding
- Ministry of Science and Technology [2012CB821600]
- Natural Science Foundation of China (NSFC) [21390400, 21202171, 21025208]
- Chinese Academy of Sciences
- National Program for Support of Top-Notch Young Professionals
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A visible-light-mediated, organic photocatalytic stereoselective radical cascade cyclization of polyprenoids is described. The desired cascade cyclization products are achieved in good yields and high stereoselectivities with eosin Y as photocatalyst in hexafluoro-2-propanol. The catalyst system is also suitable for 1,3-dicarbonyl compounds, which require only catalytic amounts of LiBr to promote the formation of the corresponding enols.
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