ChemInform Abstract: Sulfated Tungstate: An Efficient Catalyst for the Ritter Reaction.

Starbon®400-HSO3: A green mesoporous carbonaceous solid acid catalyst for the Ritter reaction

“…This reaction consists on the addition of nitriles to a wide variety of compounds capable of forming carbenium ions, such as alkenes, alcohols, carboxylic acids and esters, in the presence of concentrated sulphuric acid [2,3,4,5]. Over the years, improved processes have been reported for the synthesis of N-alkyl amides, via acid catalyzed Ritter reaction under homogeneous [6,7] and heterogeneous conditions [8,9]. Brønsted acid ionic liquids [10] and organic acids, such as 2,4-dinitrobenzenesulfonic acid (DNBSA) [11], obenzenedisulfonimide [12] and pentafluorophenyl ammonium triflate (PFPAT) [13] have also been recently applied as metal-free catalysts in the Ritter reaction.…”