Abstract
An ionic complex has been obtained from N2O4 in the presence of the macrocyclic ether 18-crown-6. This crystalline compound was used as an effective oxidizing agent for the oxidation of dihydropyridines to their corresponding pyridine derivatives at room temperature with excellent yields.
ACKNOWLEDGMENTS
Financial support for this work by the research office, Bu-Ali Sina University, Hamadan, Iran, is gratefully acknowledged.