Jjv. Eynde et al., POTASSIUM-PERMANGANATE, A VERSATILE REAGENT FOR THE AROMATIZATION OF HANTZSCH 1,4-DIHYDROPYRIDINES, Tetrahedron, 50(8), 1994, pp. 2479-2484
A variety of Hantzsch esters have been oxidized with potassium permang
anate. The structure of the final products dramatically depends on the
nature of the 4-substituent and on the experimental conditions.