A simple metal-free synthesis of 2-substituted pyridine-4,5-dicarboxylates and their N-oxides
作者:Jure Bezenšek、Benjamin Prek、Uroš Grošelj、Marta Kasunič、Jurij Svete、Branko Stanovnik
DOI:10.1016/j.tet.2012.04.013
日期:2012.6
2-aryl-, and 2-heteroaryl-substituted pyridine 3,4-dicarboxylates and their N-oxides from the corresponding methyl ketones in good to excellent yield, demonstrated with 22 examples in each case, is described. The method complements the current coupling reactions of 2-heterocyclic organometallic reagents.
在此,由相应的甲基酮简单,无金属地由相应的甲基酮合成2-烷基,2-环烷基,2-芳基和2-杂芳基取代的吡啶3,4-二羧酸酯及其N-氧化物。描述了每种情况下用22个实例证明的收率。该方法补充了2-杂环有机金属试剂的当前偶联反应。