Abstract
Amberlite IR 120 acidic resin, a polymer matrix, has been demonstrated as a catalyst for Paal-Knorr condensation of 2,5-hexadione with primary amines under solvent-free conditions. This is an efficient, mild, and green methodology for N-substituted pyrrole derivatives.
GRAPHICAL ABSTRACT
ACKNOWLEDGMENT
The authors are very grateful to the University Grants Commission India (UGC) for financial assistance.
Notes
Note. All the compounds were characterized by 1H NMR, 13C NMR, and mass spectra and verified by comparison with literature/authentic samples.