Cyclocondensation of amidines with dimethyl acetylenedicarboxylate: A convenient entry into tetramic acids
作者:Ihsan Erden、Galip Ozer、Christophe Hoarau、Weiguo Cao
DOI:10.1002/jhet.5570430220
日期:2006.3
Amidines undergo cyclocondensations with dimethyl acetylenedicarboxylate (DMAD) to give highly functionalized 5-dialkylamino-4-pyrrolin-3-ones. The products are crystalline, highly colored compounds that are uniquely functionalized and represent advanced intermediates in the construction of several other heterocyles, in particular the biologically active tetramic acids. The synthetic transformations
与乙炔基二羧酸二甲酯(DMAD)进行环缩合反应,得到高度官能化的5-二烷基氨基-4-吡咯啉-3-酮。产物是结晶的,高度着色的化合物,其被独特地官能化,并代表其他几种杂环的构建中的高级中间体,特别是具有生物活性的四酸。还描述了这些化合物向四酸的合成转化。