N-Substituted Pyrrole Synthesis by Paal–Knorr Condensation Using Recyclable Cationic Exchange Resin in Water

摘要

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.