Gold for the generation and control of fluxional barbaralyl cations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION(2012)
摘要
The frog prince with his two identities pales in comparison with the shape-shifting barbaralyl cation, which exists as a mixture of 181,400 degenerate forms. Gold-catalyzed cycloisomerizations of 7-alkynyl cyclohepta-1,3,5-trienes were found to proceed via fluxional barbaralyl intermediates. The evolution of the intermediates into 1- or 2-substituted indenes could be controlled by the choice of gold complex.
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关键词
barbaralyl cations,cyclization,enynes,fluxionality,gold catalysis
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