Abstract
A facile and efficient synthesis of polyhydroquinolines has been developed via four-component condensation reactions of aldehydes, dimedone, ethyl acetoacetate, and ammonium acetate in the presence of Novel SO3H-functionalized ionic liquid catalysts through Hantzsch reaction under ultrasound irradiation without solvent. Simple work-up procedure, environmentally friendly, inexpensive, and non-toxic catalyst, shorter reaction times along with excellent product yields are the significant features of this practical method.
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