title: FeNH4(SO4)2·12H2O (alum)-catalyzed preparation of 1,4-dihydropyridines: improved conditions for the Hantzsch reaction.
abstract: FeNH4(SO4)2·12H2O (alum) efficiently catalyzes the one-pot three-component reaction of dimedone, aldehydes, and 3-aminocrotonate to afford 1,4-dihydropyridines. The work-up is easy, and the products are obtained in good to excellent yields and high purity.
authors.affiliation: Department of Chemistry, Sabzevar Branch, Islamic Azad University, Sabzevar, Iran.
authors.forename: Ali A
authors.initials: AA
authors.lastname: Mohammadi
authors.affiliation: Department of Chemistry, Sabzevar Branch, Islamic Azad University, Sabzevar, Iran.
authors.forename: Armin
authors.initials: A
authors.lastname: Hadadzahmatkesh
authors.affiliation: Department of Chemistry, Omidieh Branch, Islamic Azad University, Omidieh, Iran.
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Asghariganjeh
keywords: 1,4-Dihydropyridines; FeNH4(SO4)2·12H2O; Hantzsch reaction; Multi-component reactions