Highly stereoselective cationic cyclization assisted by a sulfenyl group
作者:Kazuaki Kudo、Yukihiko Hashimoto、Kazuhiko Saigo
DOI:10.1016/s0040-4039(00)61599-x
日期:1993.10
When 8-acetoxy-2,6-dimethyl-9-phenylthio-2,6-nonadiene was successively treated with TMSOTf and Et3N in CH2Cl2 at room temperature, an alkylative cyclization proceeded with high diastereoselectivity to give cis-4-isopropenyl-1-methyl-3-phenylthiomethyl-1-cyclohexene. A H-1 NMR study of the reaction suggested that a cyclic sulfonium ion was formed as an intermediate. The sulfenyl group-assisted reaction could be applied for the cyclization of secondary alcohol derivatives.