A simple and very efficient protocol for the preparation of highly enantioenriched 2-alkylpiperidines has been set up, which allows the preparation of the final heterocycles with any wanted configuration at the stereogenic center starting from the same starting material. The key step of the synthesis relies on a diastereodivergent aza-Michael reaction protocol using the readily available and cheap
已经建立了用于制备高度对映体富集的2-烷基
哌啶的简单且非常有效的方案,其允许以相同的起始材料在立体发生中心制备具有任何所需构型的最终杂环。合成的关键步骤依赖于非对映的aza-Michael反应方案,使用容易获得且便宜的试剂(+)-(S,S)-伪
麻黄碱作为手性助剂。