with n-octylamine. CeO2 acts as a reusable and effective heterogeneous catalyst for transamidation undersolvent-freeconditions. Transamidation of a variety of amides and amines produced the corresponding N-alkyl amides in high yields. This method provides the first example of a heterogeneous catalyst for transamidation using aliphatic amines as substrates. Characterization of acid–base properties
such as heteroaromatic N-alky amides and morpholine amide are effectively synthesized, indicating that CeO2 can be a practically useful catalyst. A proposed mechanism includes (1) hydration of nitrile to the primary amide and (2) transamidation of the primary amide with amine as the rate-limiting step. This reaction mechanism provides a reason why the present catalytic system gives high selectivity.
Fe3+-exchanged clay catalyzed transamidation of amides with amines under solvent-free condition
作者:Md. Ayub Ali、S.M.A. Hakim Siddiki、Kenichi Kon、Ken-ichi Shimizu
DOI:10.1016/j.tetlet.2013.12.111
日期:2014.2
Fe3+-exchanged montmorillonite is shown to be an effective and reusable heterogeneous catalyst for the transamidation of various amides and amines under solvent-free condition. The catalyst shows high yields and wide substrate scope. (C) 2014 Elsevier Ltd. All rights reserved.
Benzoic Acid-Catalyzed Transamidation Reactions of Carboxamides, Phthalimide, Ureas and Thioamide with Amines
作者:Ji-Wei Wu、Ya-Dong Wu、Jian-Jun Dai、Hua-Jian Xu
DOI:10.1002/adsc.201400068
日期:2014.8.11
AbstractAn efficient and simple method for the transamidation of carboxamides, phthalimide, ureas and thioamide with amines catalyzed by commercially available benzoic acid under metal‐free conditions is described. Furthermore, to the best of our knowledge, this is the first report about the transamidation of an aromatic thioamide with amines.magnified image