Synthesis of novel 5-alkyl/aryl/heteroaryl substituted diethyl 3,4-dihydro-2<i>H</i>-pyrrole-4,4-dicarboxylates by aziridine ring expansion of 2-[(aziridin-1-yl)-1-alkyl/aryl/heteroaryl-methylene]malonic acid diethyl esters
作者:Satish S More、T Krishna Mohan、Y Sateesh Kumar、U K Syam Kumar、Navin B Patel
DOI:10.3762/bjoc.7.95
日期:——
A novel synthetic methodology has been developed for the synthesis of diethyl 5-alkyl/aryl/heteroaryl substituted 3,4-dihydro-2H-pyrrole-4,4-dicarboxylates (also called 2-substituted pyrroline-4,5-dihydro-3,3-dicarboxylic acid diethyl esters) by iodide ion induced ring expansion of 2-[(aziridin-1-yl)-1-alkyl/aryl/heteroaryl-methylene]malonic acid diethyl esters in very good to excellent yields under
开发了一种新的合成方法,用于合成 5-烷基/芳基/杂芳基取代的 3,4-二氢-2H-吡咯-4,4-二羧酸二乙酯(也称为 2-取代的吡咯啉-4,5-二氢-3 ,3-二羧酸二乙酯)通过碘离子诱导 2-[(氮丙啶-1-基)-1-烷基/芳基/杂芳基-亚甲基]丙二酸二乙酯在温和反应条件下以非常好的收率进行扩环. 已经研究了取代基对 N-乙烯基氮丙啶环扩展为吡咯啉的动力学影响的电子和空间影响。该方法合成了多种不同取代的新型吡咯啉衍生物,其产物可作为合成取代吡咯啉、吡咯和吡咯烷的关键中间体。