title: N, N, N', N'-Tetrabromobenzene-1,3-disulfonamide and poly (N-bromo-N-ethylbenzene-1,3-disulfonamide) as new and efficient catalysts for the synthesis of highly substituted 1,6-dihydropyrazine-2,3-dicarbonitrile derivatives.
abstract: Various mono and bis-1,6-dihydropyrazine-2,3-dicarbonitrile derivatives were efficiently synthesized by reacting 2,3-diaminomaleonitrile (DAMN), isocyanides and ketones in the presence of a catalytic amount of N, N, N ,N-tetrabromobenzene-1,3-disulfonamide [TBBDA] and poly(N-bromo-N-ethylbenzene-1,3-disulfonamide) [PBBS] in EtOH/H2O at ambient temperature.
authors: Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali-Sina University, 65174, Hamedan, Iran. rgvaghei@yahoo.com
authors: Ramin
authors: R
authors: Ghorbani-Vaghei
authors: Mostafa
authors: M
authors: Amiri
authors: Rahman
authors: R
authors: Karimi-Nami
authors: Zahra
authors: Z
authors: Toghraei-Semiromi
authors: Mehdi
authors: M
authors: Ghavidel
mesh_terms: D002384:Catalysis; D000431:Ethanol; D007659:Ketones / Q000737:chemistry*; D015394:Molecular Structure; D009570:Nitriles / Q000138:chemical synthesis* / Q000737:chemistry; D011719:Pyrazines / Q000138:chemical synthesis* / Q000737:chemistry; D013424:Sulfanilamides / Q000737:chemistry*; D013696:Temperature; D014867:Water
chemical_list: C523085:1,6-dihydropyrazine-2,3-dicarbonitrile; D007659:Ketones; D009570:Nitriles; D011719:Pyrazines; D013424:Sulfanilamides; D014867:Water; C022103:diaminomaleonitrile; D000431:Ethanol