A new stereospecific trans-elimination of 2-alkoxy- and 2-cycloalkoxy-tropones to alkenes and cycloalkenes: the first verification of the [<sub>s</sub>8<sub>π</sub>+<sub>a</sub>2<sub>σ</sub>+<sub>s</sub>2<sub>σ</sub>] process
作者:Hitoshi Takeshita、Hiroaki Mametsuka
DOI:10.1039/c39830000483
日期:——
Solutions of 2-alkoxy- and 2-cycloalkoxy-tropones were heated to give alkenes and cycloalkenes respectively, without skeletal rearrangement, in good yields; deuterium labelling studies confirmed a stereospecific trans-elimination, in a [s8Ï+a2Ï+s2Ï] mode, with an interesting isotope effect and a large rate retardation.