期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 135, 期 41, 页码 15662-15666出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja4085385
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资金
- ERASMUS program
- Deutsche Forschungsgemeinschaft [Sonderforschungsbereich 623]
In the presence of a gold catalyst an unprecedented oxidative cyclization of diynes takes place. The reaction cascade is initiated by an oxygen transfer from a N-oxide onto a gold-activated alkyne. The formed alpha-oxo carbene is transferred across the second alkyne yielding a stabilized vinyl carbene/cation. Alkyl migration or sp(3)-CH insertion then terminates the catalytic cycle by formation of highly substituted functionalized indenones. A 1,6-carbene shift could be supported by the oxidation of the vinyl carbene. This protocol represents an attractive alternative which are based on the metal-catalyzed decomposition of hazardous, not easily accessible, diazo compounds. to procedures
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