Philippi, Ernst; Seka, Reinhard; Robinson, Lilly published an article in 1922, the title of the article was Mellitic acid, pyromellitic acid and their formation upon the oxidation of coal. IV. Synthesis of substituted pyromellitic acids.Product Details of 41819-13-0 And the article contains the following content:
Nitration of 1,4,2,5-C6H2Me2Et2 gave a poor yield of 1,4-dinitro-2,5-dimethyl-3,6-diethyl- benzene, yellow, m. 100°. Nitration of 1,4,2,5-C6H2Me2EtAc with 5 parts HNO3 and subsequent oxidation at 160-70° gave a mononitro derivative of B, while if 10-12 parts HNO3 are used, a dinitro derivative is formed, yellow powder, m. 190-200° decomposition 1,4-Dibromo-2,5-dimethyl-3,6-diethylbenzene is obtained by dissolving C6H2Me2Et2 in ligroin and adding HNO3 and then S2Br2, needles, m. 81-2°. On oxidation with HNO3 at 140-60° in a sealed tube, 1,4-dibromo-2,5-dimethylbenzene-3,6-diacetic acid is formed, needles, decomposition about 180°; there also results 1,4-dibromo-2,5-dimethylbenzene-3,6 diketocarboxylic acid, needles, m. 232°; and dibromopyromellitic acid, decompose 230°. The experimental process involved the reaction of 3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas: 41819-13-0).Product Details of 41819-13-0
3,6-Dibromobenzene-1,2,4,5-tetracarboxylic acid(cas:41819-13-0) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Product Details of 41819-13-0
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary