Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 37, Pages 11178-11182Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201606101
Keywords
barbaralones; bullvalenes; cyclization reactions; gold; valence tautomerism
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The gold(I)-catalyzed oxidative cyclization of 7-ethynyl-1,3,5-cycloheptatrienes gives 1-substituted barbaralones in a general manner, which simplifies the access to other fluxional molecules. As an example, we report the shortest syntheses of bullvalene, phenylbullvalene, and disubstituted bullvalenes, and a readily accessible route to complex cage-type structures by further gold(I)-catalyzed reactions.
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