Abstract
A rapid and scale up protocol for the synthesis of azlactones by the Erlenmeyer method under solvent-free conditions was developed. Tungstophosphoric acid supported on nano-silica, TPA@nano-SiO2 was used as a heterogeneous catalyst for the synthesis of a wide range of azlactone derivatives. The catalyst was characterized by physicochemical measurements. The procedure was simple and permitted the quantitative isolation of products and catalyst under thermal conditions. The recycled catalyst was reused more than 5-times without loss of catalytic activity.
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The support of this work by the research Council of the University of Isfahan is acknowledged.
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Samani Ghaleh Taki, B., Mirkhani, V., Mohammadpoor-Baltork, I. et al. Synthesis and Characterization of Nano Silica Supported Tungstophosphoric Acid: An Efficient, Reusable Heterogeneous Catalyst for the Synthesis of Azlactones. J Inorg Organomet Polym 23, 758–765 (2013). https://doi.org/10.1007/s10904-012-9810-9
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DOI: https://doi.org/10.1007/s10904-012-9810-9