Sulfonated poly(4-vinylpyridine) heteropolyacid salts: A reusable green solid catalyst for Mannich reaction

Abstract

Sulfonated poly(4-vinylpyridine) heteropolyacid salts acted as a heterogeneous catalyst to effectively catalyze the one-pot synthesis of β-amino carbonyl compounds via the Mannich reaction between aromatic aldehydes, aromatic ketone, and aromatic amines. In addition, the catalyst could be easily recovered by the filtration and reused six times without significant loss of catalytic activity.