D. L. Obydennov, G. Röschenthaler, V. Sosnovskikh
Nov 27, 2013
Citations
0
Influential Citations
17
Citations
Journal
Tetrahedron Letters
Abstract
Abstract The reaction of ethyl 2-(dimethylamino)methylene-3-oxobutanoate with diethyl oxalate in the presence of sodium hydride in THF gave diethyl 4-oxo-4H-pyran-2,5-dicarboxylate, from which 4-oxo-4H-pyran-2,5-dicarboxylic and 4-oxo-1-phenyl-1,4-dihydropyridine-2,5-dicarboxylic acids and their derivatives were obtained in good yields.