
																
																	Graphene oxide: a novel acid catalyst for the synthesis of 2,5-dimethyl-N-phenyl pyrrole by the Paal-Knorr condensation
																
																
																
															Keywords: اکسید گرافن; Graphene oxide; Paal-Knorr; Pyrrole; Heterogeneous acid catalysis; In situ NMR;