title: A convenient ultrasound-promoted regioselective synthesis of fused polycyclic 4-aryl-3-methyl-4,7-dihydro-1H-pyrazolo[3,4-b]pyridines.
abstract: Fused polycyclic 4-aryl-3-methyl-4,7-dihydro-1H-pyrazolo[3,4-b]pyridines were obtained in a three-component regioselective reaction of 5-amino-3-methyl-1H-pyrazole, 2H-indene-1,3-dione and arylaldehydes in ethanol under ultrasound irradiation. This rapid method produced the products in short reaction times (4-5min) and excellent yields (88-97%).
authors.affiliation: Department of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Nikpassand
authors.forename: Manouchehr
authors.initials: M
authors.lastname: Mamaghani
authors.forename: Farhad
authors.initials: F
authors.lastname: Shirini
authors.forename: Khalil
authors.initials: K
authors.lastname: Tabatabaeian
mesh_terms: D002625:Chemistry, Organic / Q000379:methods; D002626:Chemistry, Pharmaceutical / Q000379:methods; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D014465:Ultrasonics
chemical_list: C478081:1H-pyrazolo(3,4-b)pyridine; D011720:Pyrazoles; D011725:Pyridines