Sodium acetate catalyzed tandem Knoevenagel-Michael multicomponent reaction of aldehydes, 2-pyrazolin-5-ones, and cyano-functionalized C-H acids: Facile and efficient way to 3-(5-hydroxypyrazol-4-yl)-3-aryl-propionitriles

Sodium acetate catalyzed multicomponent reaction of aryl aldehydes, 2-pyrazolin-5-ones, and malononitrile or alkyl cyanoacetates in alcohols results in the formation of substituted 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles in 80-99% yields. The developed efficient catalytic approach to the substituted 3-(5-hydroxy-3-methylpyrazol-4-yl)-3-arylpropionitriles - the promising compounds for human cardiovascular diseases therapy and different biomedical applications - is beneficial from the viewpoint of diversity-oriented large-scale processes and represents facile, efficient and environmentally benign synthetic concept for multicomponent reactions strategy. (C) 2013 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.