Rh(II)-Catalyzed Nitrene-Transfer [5 + 1] Cycloadditions of Aryl-Substituted Vinylcyclopropanes
作者:Logan A. Combee、Shea L. Johnson、Julie E. Laudenschlager、Michael K. Hilinski
DOI:10.1021/acs.orglett.9b00594
日期:2019.4.5
Formal [5 + 1] cycloadditions between aryl-substituted vinylcyclopropanes and nitrenoid precursors are reported. The method, which employs Rh2(esp)2 as a catalyst, leads to the highly regioselective formation of substituted tetrahydropyridines. Preliminary mechanistic studies support a stepwise, polar mechanism enabled by the previously observed Lewis acidity of Rh-nitrenoids. Overall, this work expands
据报道,在芳基取代的乙烯基环丙烷和亚硝烯前体之间存在正式的[5 +1]环加成反应。该方法采用Rh 2(esp)2作为催化剂,导致取代的四氢吡啶的高度区域选择性的形成。初步的机理研究支持逐步的极性机制,这是由先前观察到的Rh-类肾上腺素的路易斯酸度引起的。总的来说,这项工作将六元环的形成扩展了氮杂环转移环加成反应的应用,后者是一种相对未开发的杂环合成方法。