DBU-catalyzed three-component one-pot synthesis of highly functionalized pyridines in aqueous ethanol
作者:Ritu Mamgain、Ram Singh、Diwan S. Rawat
DOI:10.1002/jhet.32
日期:2009.1
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) efficiently catalyzes three-componentone-pot condensations of aldehyde, malononitrile, and thiophenol to produce highlyfunctionalized pyridines in excellent yield in aqueous ethanol. J. Heterocyclic Chem., 46, 69 (2009).
pot, three component synthesis of 2-amino-4-aryl-3,5-dicyano-6-sulfanylpyridines and the corresponding 1,4-dihydropyridines are from readily accessible starting materials is described. Simply heating of an ethanolic solution of structurally diverse aldehydes with various thiols and malononitrile in the presence of nanocrystalline magnesium oxide provides the highly substituted pyridine derivatives