Magnetite-supported sulfonic acid: a retrievable nanocatalyst for the Ritter reaction and multicomponent reactions
作者:Manoj B. Gawande、Anuj K. Rathi、Isabel D. Nogueira、Rajender S. Varma、Paula S. Branco
DOI:10.1039/c3gc40457a
日期:——
Magnetite-sulfonic acid (Nanocat-Fe-OSO3H), prepared by the wet-impregnation method, serves as a magnetically retrievable sustainable catalyst for the Ritter and multicomponent reactions. The as synthesized catalyst can be used in several reaction cycles without any loss of activity.
The Strecker reaction was performed via a one-pot three component condensation of hetero aromatic/aromatic aldehydes, secondary amines and trimetylsilyl cyanide in the presence of propylphosphonicanhydride (T3P®) to accomplish the corresponding α-aminonitriles. The main advantages of this method are very short reaction time and excellent yields.
Superparamagnetic iron oxide as an efficient catalyst for the one-pot, solvent-free synthesis of α-aminonitriles
作者:Mohammad M. Mojtahedi、M. Saeed Abaee、Tooba Alishiri
DOI:10.1016/j.tetlet.2009.02.199
日期:2009.5
Superparamagnetic Fe3O4 is shown to act as a very efficient catalyst for the one-pot, three-component synthesis of alpha-aminonitriles from aldehydes, amines, and TMSCN. The catalyst is easily recovered by the use of an external magnet and reused in several reactions without any noticeable loss of activity. The products are obtained rapidly at room temperature in good purity upon separation of the catalyst and evaporation of the volatiles of the reaction mixture. (C) 2009 Elsevier Ltd. All rights reserved.