N–O Tethered Carbenoid Cyclopropanation Facilitates the Synthesis of a Functionalized Cyclopropyl-Fused Pyrrolidine
作者:Dimpy Kalia、Gökce Merey、Min Guo、Herman O. Sintim
DOI:10.1021/jo400788a
日期:2013.6.21
We report a facile approach to a cyclopropyl-fused pyrrolidine, which contains four stereogenic centers, by employing the N–O tethered carbenoid methodology. The synthesis was facilitated by the development of a direct Mitsunobu reaction of alcohols with N-alkyl-N-hydroxyl amides to give diazo precursors, which upon intramolecular cyclopropanation yielded a library of N–O containing cyclopropyl-fused
我们报告了一种采用N–O系链类胡萝卜素方法的简便方法,该方法可用于环丙基融合的吡咯烷,其中包含四个立体生成中心。醇与N-烷基-N-羟基酰胺的直接Mitsunobu反应的发展促进了合成,从而产生了重氮前体,在分子内进行环丙烷化后,得到了一个由N–O组成的含环丙基稠合双环中间体的文库。对该文库一个成员的N–O部分进行精细加工导致形成所需的吡咯烷环,这表明该方法可用于制备环丙基稠合的杂环。