شماره ركورد كنفرانس :
3776
عنوان مقاله :
Melamine-(H2SO4)3/Melamine-(HNO3)3 instead of H2SO4/HNO3: A safe system for the oxidation/nitration reaction
پديدآورندگان :
Chehardoli Gholamabbas chehardoli@umsha.ac.ir Hamadan University of
Medical Sciences , Zolfigol Mohammad Ali Bu-Ali Sina University, Hamedan , Azimi Seyyedeh Bahareh Bu-Ali Sina University, Hamedan , Mallakpour Shadpour Isfahan University of Technology
عنوان كنفرانس :
بيست چهارمين سمينار شيمي آلي ايران
چكيده فارسي :
Solid acid reagents are unique acid catalysts/reagents that have become popular over the
last two decades. They have proved to be useful to chemists in the laboratory and industry due
to the good activation of adsorbed compounds, reaction rate enhancement, selectivity and
easier work-up [1].
In continuation of our studies on the application of solid acids and oxidation of
heterocyclic compounds [2] and nitration of phenols [3] we found that melamine readily
reacts with concentrated sulfuric acid and fuming nitric acid to give melamine-(H2SO4)3 (I)
and melamine-(HNO3)3 (II). It is interesting to note that these exothermic reactions are fast,
easy and clean not requiring any work-up (Figure 1)
Mixture of these new solid acids acts as unique powerful system instead of hazardous
H2SO4/HNO3 system for the oxidation of urazoles and dihydropyridines as well as nitration of
active aromatic rings under heterogeneous, solvent/metal-free and mild conditions..
