Nanopalladium on Amino-functionalized Mesocellular Foam as an Efficient and Recyclable Catalyst for the Selective Transfer Hydrogenation of Nitroarenes to Anilines
نویسندگان
چکیده
Herein, we report on the use of nanopalladium on amino-functionalized siliceous mesocellular foam as an efficient heterogeneous catalyst for the transfer hydrogenation of nitroarenes to anilines. In all cases, the protocol proved to be highly selective favoring the formation of the desired aniline as the single product in high yields with short reaction times, when employing the naturally-occurring and renewable γ-terpinene as hydrogen donor. Furthermore, the catalyst displayed excellent recyclability over five cycles and negligible leaching of metal into solution, making it an eco-friendly and economic alternative for carrying out this transformation. The scalability of the protocol was demonstrated with the reduction of 4-nitroanisole on a 2 g scale, where p-anisidine was isolated in 98% yield.
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