title: Silica bonded S-sulfonic acid: a recyclable catalyst for the synthesis of quinoxalines at room temperature.
abstract: The reaction of 3-mercaptopropylsilica (MPS) and chlorosulfonic acid in chloroform afforded silica bonded S-sulfonic acid (SBSSA), which was used as a catalyst for the room temperature synthesis of quinoxaline derivatives from 1,2-diamino compounds and 1,2-dicarbonyl compounds. The catalyst could be recycled and reused several times without any loss of efficiency.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr, Iran. niknam@pgu.ac.ir
authors.forename: Khodabakhsh
authors.initials: K
authors.lastname: Niknam
authors.forename: Dariush
authors.initials: D
authors.lastname: Saberi
authors.forename: Maleki
authors.initials: M
authors.lastname: Mohagheghnejad
mesh_terms: D002384:Catalysis; D002725:Chloroform / Q000737:chemistry; D015394:Molecular Structure; D011810:Quinoxalines / Q000138:chemical synthesis* / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013696:Temperature
chemical_list: D011810:Quinoxalines; D013451:Sulfonic Acids; C013880:chlorosulfonic acid; D012822:Silicon Dioxide; D002725:Chloroform