title: Pyridine-functionalized MCM-41 as an efficient and recoverable catalyst for the synthesis of pyran annulated heterocyclic systems.
abstract: Pyridine-functionalized MCM-41 catalyzed reactions between tetracyanoethylene and various activated CH-acid compounds are described. These reactions afford the corresponding pyran annulated heterocyclic ring systems in high yields at room temperature within a few minutes. The work-up procedure is very simple and the products do not require further purification. The catalyst can be recycled and reused for several times without observable loss of performance.
authors.affiliation: Department of Chemistry, Shahid Beheshti University, G.C., P.O. Box 19396-4716, Tehran, Iran. a-shaabani@cc.sbu.ac.ir
authors.forename: Ahmad
authors.initials: A
authors.lastname: Shaabani
authors.forename: Mostafa
authors.initials: M
authors.lastname: Mohammadpour Amini
authors.forename: Sabrieh
authors.initials: S
authors.lastname: Ghasemi
authors.forename: Rahim
authors.initials: R
authors.lastname: Ghadari
authors.forename: Ali Hossein
authors.initials: AH
authors.lastname: Rezayan
authors.forename: Yousef
authors.initials: Y
authors.lastname: Fazaeli
authors.forename: Shahzad
authors.initials: S
authors.lastname: Feizi
mesh_terms: D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry; D009570:Nitriles / Q000737:chemistry; D011714:Pyrans / Q000138:chemical synthesis* / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D005030:Ethylenes; C509968:MCM-41; D009570:Nitriles; D011714:Pyrans; D011725:Pyridines; D012822:Silicon Dioxide; C003393:tetracyanoethylene; C023666:pyridine