One-pot,four-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones catalyzed by cellulose-SO3H as a reusable heterogeneous and efficient catalyst |
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Authors: | Hamid Reza Shaterian Fatemeh Rigi |
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Institution: | 1. Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, PO Box 98135-674, Zahedan, Iran
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Abstract: | A practical and green method for the synthesis of 2H-indazolo2,1-b]phthalazine-1,6,11(13H)-trione derivatives using cellulose-SO3H as a solid acidic catalyst for the four-component condensation reaction of hydrazinium hydroxide, phthalic anhydride, dimedone, and aromatic aldehydes under thermal solvent-free conditions is described. Cellulose-SO3H as a recyclable green chemical compound has been demonstrated as a new catalyst for the synthesis of this class of compounds. |
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