A common compound: 49764-63-8, name is 4,5-Dibromobenzene-1,2-diamine, belongs to bromides-buliding-blocks compound, it can change the direction of chemical reaction, and react with certain compounds to generate new functional products. A new synthetic method of this compound is introduced below. 49764-63-8
6,7-Dibromo-1,4-dihydroquinoxaline-2,3-dione. A mixture of 4,5-dibromo-1,2-phenylenediamine (1.862 g, 7.0 mmol) and oxalic acid dihydrate (1.06 g, 8.4 mmol) in 2N HCl (100 mL) was heated at 125 C. for 2 h then allowed to cool to 25 C. The solid was collected by vacuum filtration, washed with water and dried at 40 C. under 1 mmHg for 10 h affording 2.053 g (92%) of the title compound as a light brown powder. 1 H NMR (DMSO-d6) 11.995 (s, 2H), 7.361 (s, 2H).
In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 49764-63-8, other downstream synthetic routes, hurry up and to see.
Reference:
Patent; The State of Oregon, acting by and through The Oregon State Board of Higher Education, acting for and on behalf of The Oregon Health Sciences University; The University of Oregon; The Regents of the University of California; US5514680; (1996); A;,
Bromide – Wikipedia,
bromide – Wiktionary