University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 9 4 1998 12 01 AROMATIZATION OF 1 , CDIHYDROPYRIDINES WITH OXYGEN OR AIR USING MANGANESE AND COBALT SALTS OF p-AMINOBENZOIC ACID SUPPORTED ON SILICA GEL AS OXIDIZING CATALYSTS - 31480 EN Journal Article Hantzsch 1,4-dihydropyridines are oxidized to the corresponding pyridine derivatives using oxygen or air and a mixture of the manganese and cobalt salts of parninobenzoic acid supported on silica gel as the catalysts. Reactions are clean and the catalysts can be recovered easily and reused repeatedly. https://jsciences.ut.ac.ir/article_31480_87688e644bd630526fedd4f22613cef9.pdf