Title of article :
Synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] and spiro[indoline-3,4′-pyrano[2,3-c]chromene] derivatives using silica-bonded ionic liquids as a recyclable catalyst in aqueous medium
Author/Authors :
Niknam, Khodabakhsh Department of Chemistry - Faculty of Sciences - Persian Gulf University, Bushehr , Piran, Abolhassan Department of Chemistry - Faculty of Sciences - Persian Gulf University, Bushehr , Zahra, Karimi Department of Chemistry - Faculty of Sciences - Persian Gulf University, Bushehr
Abstract :
Silica-bonded ionic liquids is employed as a recyclable catalyst for the synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazoles] via one-pot condensation reaction of isatin, activated methylene reagents, and 3-methyl-l-phenyl-5-pyrazolone in refluxing aqueous medium in good to high yields. Also, these silica-bonded ionic liquids were used as catalysts for the synthesis of spiro[indoline-3,4′-pyrano[2,3-c]chromene derivatives in refluxing aqueous medium in high yields. Catalyst could be recycled for several times without any additional treatment.
Keywords :
Spiro[indoline-3,4′-pyrano[2,3-c]pyrazoles] , Spiro[indoline-3,4′-pyrano[2,3-c]chromenes] , Silica-bonded ionic liquids , Heterogeneous catalyst , Synthesis , Water
Journal title :
Astroparticle Physics
