Abstract
A combination of potassium monopersulfate and sodium nitrite in the presence of wet SiO2 was used as an effective oxidizing agent for the oxidation of urazoles and bis-urazoles to their corresponding triazolinediones under mild and heterogeneous conditions with excellent yields.
ACKNOWLEDGMENTS
Financial support for this work by the Research Affairs of Bu-Ali Sina University, Hamadan, Iran, is gratefully acknowledged.