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.
2-烷氧基和2-环烷氧基的特罗庞化合物的溶液被加热,分别生成烯烃和环烯烃,且未发生骨架重新排列,产率良好;
氘标记研究确认了以[s8π+a2σ+s2σ]模式进行的立体选择性反式消除,具有有趣的同位素效应和较大的反应速率滞后。