Five types of reactions between (dimethylalumino)(trimethylsilyl)methylamine Me2AlNMeSiMe3 and carbonylcompounds (ketones, esters and amides) were found to occur, depending on the structure of the carbonylcompounds. Among others two new interesting compounds, 4-(dimethylamino)-4-(methylamino)-3-buten-2-one CH3COCHC(NHMe)NMe2 from acetamide and N, O-dimethylacylimidatetetramethyldialumoxane
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 dimethylacetylenedicarboxylate (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 tetramicacids. The synthetic transformations