Efficient Synthesis of Spiro[diindenopyridine-indoline]triones Catalyzed by PEG-OSO3H-H2O and [NMP]H2PO4 |
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Authors: | Jayant Sindhu Harjinder Singh |
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Institution: | Department of Chemistry , University of Delhi , Delhi , India |
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Abstract: | One-pot, three-component synthesis of spirodiindenopyridine-indoline]triones has been reported via the reaction of 1,3-indandione, aromatic amines, and isatins with (PEG-OSO3H) as an efficient, polymeric acid surfactant–based catalyst in water and also in presence of acidic ionic liquid NMP]H2PO4, which acts both as a medium and catalyst under conventional heating and ultrasonic irradiation. The reactions were complete in short reaction times with excellent yield of products. Surfactant-based PEG-OSO3H could be recycled and reused several times without any significant loss of activity. The compounds exhibit fluorescence in methanol with large Stokes shift. |
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Keywords: | Biodegradable multicomponent reactions (MCRS) [NMP]H2PO4 PEG-6000 polymeric spiro compounds water |
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