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Simple, Convenient and Heterogeneous Method for Conversion of Urazoles to Triazolinediones Using N,N,N′,N′-Tetrabromobenzene-1,3-disulfonylamide or Trichloromelamine under Mild and Heterogeneous Conditions

Mohammad Ali Zolfigol*a, Ramin Ghorbani-Vagheia, Shadpour Mallakpourb, Gholamabbas Chehardolia, Arash Ghorbani Choghamarania, Amaneh Hosain Yazdia
a Department of Chemistry, College of Science, Bu-Ali Sina University, P. O. Box 4135, Hamadan 65174, Iran
e-Mail: Zolfi@basu.ac.ir;
b Organic Polymer Chemistry Research Laboratory, College of Chemistry, Isfahan University of Technology, Isfahan 84156, Iran