Stannous triflate promotes rearrangement of β-keto sulfoxides to generate α-thiocarbocation, which in turn react with silyl enol ethers to give 2-arylsulfenyl-1,4-diketones in good yields.
The methoxycarbonylalkylation and methoxycarbonylalkylidenation of silyl enol ethers
作者:Ian Fleming、Javed Iqbal
DOI:10.1016/s0040-4039(00)81397-0
日期:1983.1
Silyl enolethers (1) react with the phenylthio(methoxycarbonyl)alkyl chlorides (2) in the presence of Lewis acids to give good yields of the γ-ketoesters (3); oxidative and reductive desulphurisations give the saturated (4) and unsaturated (5 or 6) γ-keto esters, respectively.