The correlation between the structure of the intermediates and final products during the reactions of the methylmagnesium iodide with several 2-pyrones could be established by intercepting the intermediates before hydrolysis using methyl iodide in HMPT. In this way it was possible to show that these reactions either involve the formation of the dihydropyranol or the unsaturated E-ketol depending on
甲基碘化镁与几种2-
吡喃酮反应时,中间体的结构与最终产物之间的相关性可以通过在HM
PT中用甲基
碘水解之前截获中间体来建立。以这种方式,有可能表明,取决于这些中间体的立体
化学,这些反应要么涉及二氢
吡喃醇的形成,要么涉及不饱和E-酮醇的形成。确定了环状烷氧基
镁的存在,因此证明了
水解前存在互变异构“环链”平衡。