Endo selective cyclizations of selenonium ion intermediate: efficient formation of 1-halo-3-seleno-cyclohexanes
作者:Tadashi Kataoka、Mitsuhiro Yoshimatsu、Hiroshi Shimizu、Mikio Hori
DOI:10.1016/s0040-4039(00)71230-5
日期:1991.1
Selenoacetal 1 was cyclized with tin(IV) chloride in the 6-Endo-Trig mode to give 1-chloro-3-methylselenocyclohexanes (2a,b), regio- and stereoselectively. Bromo- or iodocyclohexane derivatives were afforded by use of tin(IV) bromide or titanium(IV) iodide, respectively.
将
硒缩醛1在6-Endo-Trig模式下用
氯化锡(IV)环化,以区域和立体选择性生成1-
氯-3-甲基
硒代
环己烷(2a,b)。分别通过使用
溴化锡(IV)或
碘化
钛(IV)提供
溴或
碘环己烷衍
生物。