Reaction of commercially available 2,5-hexanedione and primary amino compounds in the presence of ammonium chloride produced N-substituted pyrroles in excellent yield. In contrast to other available methods, this current procedure for the preparation of pyrroles is exceedingly simple, efficient, and eco-friendly and therefore, may find numerous applications in this field.
Bandyopadhyay, Debasish and Banik, Bimal K., "AMMONIUM CHLORIDE-INDUCED SYNTHESIS OF PYRROLES VIA PAALKNORR REACTION" (2017). Chemistry Faculty Publications and Presentations. 93.