Au(I)-Catalyzed cycloisomerizations terminated by sp(3) C-H bond insertion.
Au(I)-Catalyzed cycloisomerizations terminated by sp(3) C-H bond insertion.
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DOI:
10.1021/ja808780r
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发表时间:
2009-03-04
影响因子:
15
通讯作者:
Toste FD
中科院分区:
文献类型:
--
作者:
Horino Y;Yamamoto T;Ueda K;Kuroda S;Toste FD
The gold(I)-catalyzed cycloisomerization 1,5-enynes and 1,4-allylallenes to tetracyclododecane and tetracyclotridecane derivatives is reported. Complexation of the cationic gold(I) complex to either the alkyne or the allene moiety induces an intramolecular addition of the alkene leading to gold(I)-stabilized carbenoid intermediate. This intermediate undergoes a formal sp3-C-H insertion to generate the tertacyclic adduct. A series of deuterium labeling experiments show that the C-H functionalization step proceeds with an inverse kinetic isotope effect.
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