Selective Synthesis of N-Substituted 1,2-Dihydropyridines from Furans by Copper-Induced Concurrent Tandem Catalysis
作者:Manuel R. Fructos、Eleuterio Álvarez、M. Mar Díaz-Requejo、Pedro J. Pérez
DOI:10.1021/ja1006614
日期:2010.4.7
A novel transformation in which mono- or dialkyl-substituted furans are converted into 1,2-dihydropyridines upon reaction with PhI horizontal lineNTs at room temperature is reported. The reaction is catalyzed by complexes of general formula Tp(x)M (M = Cu, Ag) and consists of a one-pot procedure with four consecutive catalytic cycles. Furan aziridination is followed by aziridine ring-opening, transimination
报道了一种新的转化,其中单或二烷基取代的呋喃在室温下与 PhI 水平 lineNT 反应后转化为 1,2-二氢吡啶。该反应由通式 Tp(x)M (M = Cu, Ag) 的络合物催化,由具有四个连续催化循环的一锅法组成。呋喃氮丙啶化之后是氮丙啶开环、转亚胺化反应、逆电子需求氮杂-狄尔斯-阿尔德反应和最终的氢消除反应。提出了整体转变的机制,其中金属配合物在反应途径中发挥关键作用。