Imidazole derivatives R 0190Metal-Free Oxidative Dehydrogenation of Imidazolines and Pyrazolines Using Silica-Adsorbed Peroxymonosulfate under Aprotic and Almost Neutral Conditions. -Pyrazolines (I) and imidazolines (III) are converted to their corresponding pyrazoles (II) and imidazoles (IV), resp., using a facile and environmentally benign oxidation process. -(ADIBI*, H.; HAJIPOUR, A. R.; JAFARI, H.; Chem.