Simultaneous sonication assistance for the synthesis of tetrahydropyridines and its efficient catalyst ZrP2O7 nanoparticles |
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Institution: | 1. Chemistry Department, Imam Hossein University, P.O. Box 16575-347, Tehran, Iran;2. Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan 51167, Iran |
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Abstract: | In this research, a general synthetic method for the synthesis of tetrahydropyridines were developed using ZrP2O7 nanoparticles under ultrasonic irradiations. Firstly by a simple and green process, nano zirconium pyrophosphate was prepared via sonication. Subsequently, this nanoparticle was used as an efficient catalyst for the synthesis of highly functionalized tetrahydropyridines via five-component reaction of aromatic aldehyde, amine and ethyl acetoacetate in ethanol under ultrasound irradiation. The present approach offers several advantages such as high yields, environmentally benign, simple work-up, excellent yield of products, short reaction times as well as recoverability and reusability of the catalyst. |
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Keywords: | Ultrasonic irradiation Tetrahydropyridines Multicomponent reactions Green chemistry |
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