Reductive sulfur extrusion reaction of 2,1,3-benzothiadiazole compounds: a new methodology using NaBH4/CoCl2·6H2O(cat) as the reducing system was written by Da Silveira Neto, Brenno A.;Lopes, Aline S.;Wuest, Martina;Costa, Valentim E. U.;Ebeling, Guenter;Dupont, Jairton. And the article was included in Tetrahedron Letters in 2005.HPLC of Formula: 148231-12-3 This article mentions the following:
A new simple and efficient methodol. for reductive sulfur extrusion from 2,1,3-benzothiadiazoles was developed using NaBH4 in the presence of catalytic amounts of CoCl2.6H2O (1 mol%). This method is an efficient alternative for the generation of various 1,4-disubstituted 2,3-diaminobenzenes from 4,7-disubstituted 2,1,3-benzothiadiazoles. The diamines can be easily converted into 4,7-disubstituted quinoxalines by simple reaction with glyoxal-sodium bisulfite. In the experiment, the researchers used many compounds, for example, 5,8-Dibromoquinoxaline (cas: 148231-12-3HPLC of Formula: 148231-12-3).
5,8-Dibromoquinoxaline (cas: 148231-12-3) belongs to pyrazine derivatives. Pyrazines are part of several biologically active polycyclic compounds; examples are quinoxalines, phenazines; and the bio-luminescent natural products pteridines, flavins, and their derivatives. Pyrazines undergo nearly all of the same reactions as pyrimidines, from nucleophilic substitution (SNAr) to palladium-catalyzed cross coupling reactions.HPLC of Formula: 148231-12-3