title: Green condensation reaction of aromatic aldehydes with active methylene compounds catalyzed by anion-exchange resin under ultrasound irradiation.
abstract: To realize a practical and green chemistry, two important challenges need to be addressed, namely the effective process for the activation of reaction and efficient, eco-friendly and robust chemical methods for the reaction conversion to target products via highly selective catalytic and reactions. Ultrasonic energy promotes the conversion process through its special cavitational effects. Combined with anion-exchange resin as a heterogeneous, reusable and efficient catalyst, Ultrasonic energy enhances the Knoevenagel condensation and leads to reduced reaction time at lower reaction temperature with less amounts of solvent and catalyst.
authors.affiliation: Laboratory of Applied Chemistry: Heterocyclics, Fats and Polymers, Faculty of Sciences, University of Sfax, Soukra Street Km 3.5, 3038 Sfax, Tunisia. Electronic address: hbelhadjammar@yahoo.fr.
authors.forename: Hafedh Belhadj
authors.initials: HB
authors.lastname: Ammar
authors.affiliation: Laboratory of Applied Chemistry: Heterocyclics, Fats and Polymers, Faculty of Sciences, University of Sfax, Soukra Street Km 3.5, 3038 Sfax, Tunisia.
authors.forename: Manef
authors.initials: M
authors.lastname: Chtourou
authors.affiliation: Laboratory of Applied Chemistry: Heterocyclics, Fats and Polymers, Faculty of Sciences, University of Sfax, Soukra Street Km 3.5, 3038 Sfax, Tunisia.
authors.forename: Mohamed Hédi
authors.initials: MH
authors.lastname: Frikha
authors.affiliation: Laboratory of Applied Chemistry: Heterocyclics, Fats and Polymers, Faculty of Sciences, University of Sfax, Soukra Street Km 3.5, 3038 Sfax, Tunisia.
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Trabelsi
keywords: Anion-exchange resin; Green chemistry; Knoevenagel condensation; Ultrasonic energy