期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 130, 期 52, 页码 17642-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja806685j
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资金
- National Science Foundation [CHE-0909683]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0809683] Funding Source: National Science Foundation
The vast majority of homogeneous Au-catalyzed reactions have exploited the propensity of Au to activate unsaturated carbon-carbon bonds as electrophiles. It is generally assumed that a nucleophile attacks a gold-activated carbon-carbon multiple bond to give an alkenyl Au intermediate, notwithstanding the fact that these intermediates are hitherto unknown. We have obtained room temperature stable gamma-lactone gold(I) complexes through the reaction of cationic Au(I) reagents with allenoates, under mild conditions. The reactions of one such complex with electrophiles yielded the expected products of Au-catalyzed cyclizations. These results furnish experimental evidence for the mechanism of Au-catalyzed cyclizations.
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