Abstract: The synthesis of amides 2 from the corresponding aromatic acids and aliphatic amines in the presence of catalytic amount of p-toluenesulfonic acid has been reported. The reactions are accelerated with microwave irradiation under solvent-free conditions to afford a high yielding synthesis of amides.
[Hegarty, Anthony F.; Eustace, Stephen J.; Tynan, Nuala M.; Pham-Tran, Nguyen-Nguyen; Nguyen, Minh Tho Journal of the Chemical Society. Perkin Transactions 2, 2001 , # 7 p. 1239 - 1246]