Ar. Hajipour et al., Oxidation of urazoles to triazolinediones with benzyltriphenylphosphonium peroxymonosulfate under solvent-free conditions, CHEM LETT, (2), 2001, pp. 164-165
Benzyltriphenylphosphonium peroxymonosulfate (PhCH2Ph3PHSO5) in the presenc
e of AlCl3 was used as an effective oxidizing reagent for the oxidation of
urazoles to their corresponding triazolinediones in high yields under solve
nt-free conditions.