α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles
作者:Uroš Grošelj、Mojca Žorž、Amalija Golobič、Branko Stanovnik、Jurij Svete
DOI:10.1016/j.tet.2013.11.008
日期:2013.12
simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose
的新颖的新的和简单的合成ñ -保护的5-取代-4-羟基吡咯-3-羧酸酯,其存在于与他们的4-氧代互变异构体平衡,已经在从开始的两个步骤被开发ñ -保护的α氨基酸。关键中间体是烯胺酮,其也被分离,表征,并用于其它官能化杂环的结构,才自发分解到吡咯产物。4-羟基吡咯易于部分空中氧化,但是可以有效地烷基化或还原成稳定的多取代的吡咯烷衍生物。