Mechanistic surprises in the gold(I)-catalyzed intramolecular hydroarylation of allenes.
Mechanistic surprises in the gold(I)-catalyzed intramolecular hydroarylation of allenes.
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DOI:
10.1002/anie.200902049
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发表时间:
2009
影响因子:
16.6
通讯作者:
Gagne, Michel R.
中科院分区:
文献类型:
--
作者:
Weber, Dieter;Tarselli, Michael A.;Gagne, Michel R.
Gold (I)-catalyzed carbon-carbon bond forming reactions continue to fascinate the synthetic community but are less well investigated than many conventional metal catalysts.[1] In many cases a cationic gold (I)-species activates an unsaturated CC bond and isomerizes or functionalizes it to build molecular complexity through reactive intermediates that include gold-π-complexes, gold-vinyls, and gold-carbenes. Support for these intermediates is mainly based on gold (I) organometallic chemistry, though computational studies and the isolation of proposed catalytic intermediates have been reported.[2–5]We report mechanistic studies on a seemingly simple gold (I)-catalyzed reaction and demonstrate the importance of dinuclear organometallic intermediates. While similar dinuclear species have been postulated in DFT studies,[5b] di-gold intermediates have yet to be detected in situ and their reactivity characterized.
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