Ionic Liquid Catalyzed One‐Pot Synthesis of 2H‐Pyridazino[1,2‐a]indazole‐1,6,9(11H)‐triones Via Three‐Component Reaction under Solvent‐Free Conditions |
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| Authors: | Maohua Ding Hongyun Guo |
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| Affiliation: | College of Chemical Engineering and Materials, Zhejiang University of Technology, Zhejiang, People's Republic of China |
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| Abstract: | 2H‐Pyridazino1,2‐a]indazole‐1,6,9(11H)‐triones were synthesized through one‐pot, three‐component condesation of aldehydes, maleic hydrazide, and dimedone using a green and inexpensive Brönsted acidic ionic liquid 1‐methyl‐2‐pyrrolidinone hydrosulfate (Hnmp]HSO4) as catalyst under solvent‐free conditions. The method provided several advantages such as milder conditions, shorter reaction time, high yields, and environmentally benign procedure. |
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