Nano n‐propylsulfonated γ‐Al2O3: a new,efficient and reusable catalyst for synthesis of spiro[indoline‐3,4‐pyrazolo[3,4‐e][1,4]thiazepine]diones in aqueous media |
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Authors: | Li Qiang Wu |
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Institution: | School of Pharmacy, Xinxiang Medical University, , Xinxiang, Henan, 453003 China |
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Abstract: | Nano n‐propylsulfonated γ‐Al2O3 is easily prepared by the reaction of nano γ‐Al2O3 with 1,3‐propanesultone. This reagent can be used as an efficient catalyst for the synthesis of spiro indoline‐3,4‐pyrazolo3,4‐e]1,4]thiazepine]diones in aqueous media. This new method consistently has the advantages of excellent yields and short reaction times. Further, the catalyst can be reused and recovered several times. Copyright © 2013 John Wiley & Sons, Ltd. |
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Keywords: | nano n‐propylsulfonated γ ‐Al2O3 1 4‐thiazepine spirooxindole heterogeneous catalysis nanoparticles multicomponent reactions |
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