Electrophilic Heteroaromatic Substitutions. 5. Acid-Catalyzed Reaction of Ethyl 3,4,5-Trimethylpyrrole-2-carboxylate with Diazonium Salts in Aqueous Acetic Acid

Article abstract of DOI:10.1021/jo00348a031

The reaction with diazonium salts of the title compound, 1, has been examined in detail by chromatographic and spetroscopic methods.In the presence of a strong mineral acid, 1 reacts with p-nitrobenzenediazonium ions to give a red, chemically labile, azo