One-pot, four-component synthesis of new 3,4,7,8-tetrahydro-3,3-dimethyl-11-aryl-2H-pyridazino[1,2-a]indazo l e-1,6,9(11H)-triones and 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-triones using an acidic ionic liquid N,N-diethyl-N-sulfoethanammonium chloride ([Et sub(3)N-SO sub(3)H]Cl) as a highly efficient and recyclable catalyst

A rapid and efficient one-pot, four-component protocol for the synthesis of novel 2H-pyridazino[1,2-a]indazole-1,6,9(11H)-triones (6) and 2H-indazolo[2,1-b]phthalazine-1,6,11-triones (7) has been developed using a stable and reusable Broensted acidic ionic liquid N,N-diethyl-N-sulfoethanammonium chl...

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Bibliographic Details
Published inTetrahedron letters Vol. 57; no. 9; pp. 1006 - 1010
Main Authors Pouramiri, Behjat, Kermani, Esmat Tavakolinejad
Format Journal Article
LanguageEnglish
Published 02.03.2016
Subjects
Aldehydes
Byproducts
Catalysts
Chlorides
Ionic liquids
Reusable
Synthesis
Tetrahedrons
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Summary:A rapid and efficient one-pot, four-component protocol for the synthesis of novel 2H-pyridazino[1,2-a]indazole-1,6,9(11H)-triones (6) and 2H-indazolo[2,1-b]phthalazine-1,6,11-triones (7) has been developed using a stable and reusable Broensted acidic ionic liquid N,N-diethyl-N-sulfoethanammonium chloride ([Et sub(3)N-SO sub(3)H]Cl). A range of diverse aldehydes were successfully applied and the corresponding products obtained in good to excellent yields without any by-products.
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ISSN:0040-4039
DOI:10.1016/j.tetlet.2016.01.074