Beilstein Journal of Organic Chemistry (May 2011)
Gold-catalyzed alkylation of silyl enol ethers with ortho-alkynylbenzoic acid esters
Abstract
Unprecedented alkylation of silyl enol ethers has been developed by the use of ortho-alkynylbenzoic acid alkyl esters as alkylating agents in the presence of a gold catalyst. The reaction probably proceeds through the gold-induced in situ construction of leaving groups and subsequent nucleophilic attack on the silyl enol ethers. The generated leaving compound abstracts a proton to regenerate the silyl enol ether structure.
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