N‐Substituted pyrrole synthesis by Paal–Knorr condensation using recyclable cationic exchange resin in water

Abstract

in Wiley InterScience (www.interscience.wiley.com).Cationic exchange resin has been utilized for the first time as a novel and recyclable heterogeneous catalyst for the synthesis of N-substituted pyrroles from variety of 1,4-diketones and aniline. This simple synthesis has been accomplished with excellent yields. The recovered catalyst can be reused for subsequent runs with only a gradual decrease in activity.