2000/01/01 by Jhillu S. Yadav, J. S. Yadav, B. V. Subba Reddy +4
Chemistry · #Multicomponent Synthesis of Heterocycles #Synthesis of heterocyclic compounds #Microwave-Assisted Synthesis and Applications
paper · doi:10.1055/s-2000-7613
4-Alkyl or aryl substituted Hantzsch 1,4-dihydropyridines are aromatized to the corresponding pyridines in high yields by iodine in refluxing methanol. The method tolerates several substituents such as alkyl, benzyl, aryl and heterocyclic groups present in the 4-position of pyridines.