in Wiley Online Library (wileyonlinelibrary.com). 1 3 4 9 12 10a-d2-(2-Amino-3,5-dinitrophenyl)-2-oxoacetic acid (2) was obtained from hydrolysis of 5,7-dinitroisatin (1) in alkaline media. A novel quinoxaline derivative (3) was synthesized from the reaction of the same compound (1) with o-phenylenediamine. Reacting 2 with ethyl 3-oxo-3-phenylpropanoate yields 6,8-dinitro-2-phenylquinoline-3,4-dicarboxylic acid (4). Then, 4 was converted into new quinoline-diacylchloride, quinoline-ester, quinolinedicarboxamide, pyridazine, and pyrroledione derivatives (5, 6a-d, 7a-d, 8, 9, 10a-d, 11a-b, 12) with SOCl 2 , alcohols, amines, and hydrazines, respectively. The structures of synthesized compounds were clarified by 1 H NMR, 13 C NMR, IR, mass and elemental analysis methods.