Melamine trisulfonic acid (MTSA) as an efficient catalyst for the synthesis of triazolo[1,2-a]indazole-triones and some 2H-indazolo[2,1-b]phthalazine-triones

Authors

  • Mohammad Ali Zolfigol Faculty of Chemistry, University of Bu-Ali Sina, 65178, Hamedan, Iran.
  • Shadpour Mallakpour Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan, Iran. Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, Isfahan, Iran.
Abstract:

Melamine trisulfonic acid (MTSA) as an efficient heterogeneous catalyst has been used for the one-pot preparation of triazolo[1,2-a]indazole-1,3,8-trione and 2H-indazolo[2,1-b]phthalazine-1,6,11-trione derivatives by the three-component condensation reaction of urazoles or phthalhydrazide, dimedone or 1,3-cyclohexanedione, and aldehydes under solvent-free conditions in good to excellent yields and short reaction times.

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Journal title

volume 3  issue 4

pages  211- 220

publication date 2013-12-01

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