Generic placeholder image

Letters in Organic Chemistry


ISSN (Print): 1570-1786
ISSN (Online): 1875-6255

Mono- and Bis-2-amino-4H-pyrans: Alum Catalyzed Three- or Pseudo Five-Component Reaction of 4-Hydroxycoumarin, Malononitrile and Aldehydes

Author(s): Ali Reza Karimi and Cyrus Eslami

Volume 8, Issue 2, 2011

Page: [150 - 154] Pages: 5

DOI: 10.2174/157017811794697421

Price: $65


An efficient method for the three- or pseudo five-component synthesis of mono- and bis-2-amino-4H-pyrans in excellent yields using Alum (KAl(SO4)2.12H2O) as recyclable catalyst is described. The present methodology offers several advantages such as excellent yields, simple procedures, shorter reaction times, milder conditions and the catalysts exhibited remarkable reusable activity.

Keywords: Alum (KAl(SO4)2.12H2O), 2-Amino-4H-pyrans, 4-Hydroxycoumarin, 1,4-dihydropyridines, triethylamine, aldehydes, aminophosphonates, malononitrile, Spectrophotometer, nitrobenzaldehyde

Rights & Permissions Print Export Cite as
© 2023 Bentham Science Publishers | Privacy Policy