作者:Chen, Zhenyu、Song, Geyang、Qi, Leiming、Gunasekar, Ramachandran、Aïssa, Christophe、Robertson, Craig、Steiner, Alexander、Xue, Dong、Xiao, Jianliang
DOI:10.1021/acs.joc.4c00493
日期:——
as scope and functional group tolerance. Herein, we describe a rhodium-catalyzed transfer hydrogenation of pyridinium salts to access N-(hetero)aryl piperidines. The reaction proceeds via a reductive transamination process, involving the initial formation of a dihydropyridine intermediate via reduction of the pyridinium ion with HCOOH, which is intercepted by water and then hydrolyzed. Subsequent reductive
饱和N-杂环存在于许多生物活性天然产物中,并且普遍存在于药物和农用化学品中。虽然它们的合成方法有很多,但每种方法都有其局限性,例如范围和官能团耐受性。在此,我们描述了吡啶鎓盐的铑催化转移氢化以得到N-(杂)芳基哌啶。该反应通过还原氨基转移过程进行,涉及通过用 HCOOH 还原吡啶鎓离子初步形成二氢吡啶中间体,该中间体被水拦截,然后水解。随后用外源(杂)芳基胺进行还原胺化,得到N-(杂)芳基哌啶。因此,这种还原氨基转移方法允许从容易获得的吡啶衍生物中获得N-(杂)芳基哌啶,从而扩展了脱芳构化和骨架编辑的工具箱。