Heterocycles [h]-Fused onto 4-Oxoquinoline-3-carboxylic Acid, V [1]. Synthesis and Antibacterial Activity of Some New 2,3-Disubstituted 7-Oxo-7,10-dihydropyrido[2,3-f]quinoxaline-8-carboxylic Acids and Esters
作者:Esra’a S. Abu-Sheaib、Jalal A. Zahra、Mustafa M. El-Abadelah、Wolfgang Voelter
DOI:10.1515/znb-2008-0513
日期:2008.5.1
3-carboxylate (2) or the -3-carboxylic acid 3 with sym-1,2- diketones produced the corresponding ethyl 2,3-disubstituted pyrido[2,3- f ]quinoxaline-8-carboxylates (4a - h) or the -8-carboxylic acids 5a - h, respectively. The structures for these new heterocycles are supported by analytical and spectral (IR, MS, NMR) data. Compounds 5a - c, g, h exhibit moderate activity against an assortment of bacterial