A New Mild Method for the C-Acylation of Ketone Enolates. A Convenient Synthesis of beta-Keto-Esters, -Thionoesters, and -Thioesters

[摘要]：A new method for ketone enolate C-acylation is described which utilizes alkyl pentafluorophenylcarbonates, thiocarbonates, and thionocarbonates as the reactive acylating agents, and MgBr2 center dot Et2O, DMAP, and i-Pr2NEt as the reagents for enolization. A wide range of ketones have been observed to undergo clean C-acylation via this protocol.

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