SEARCH Articles Figures Tables Continuous Paal—Knorr pyrrole synthesis Heterocycle synthesis Paal-Knorr pyrrole Knorr pyrrole synthesis Knorr pyrrole) Knorr synthesis Paal pyrrole) Paal synthesis Paal-Knorr Pyrrole synthesis Mechanism Paal-Knorr synthesis of pyrroles Pyrroles, Paal-Knorr synthesis Pyrroles, synthesis