Application of iminium salts in the synthesis of fused pyridines. Introduction of substituents using ternary iminium perchlorates

Article abstract of DOI:10.1016/S0040-4039(00)60776-1

Ternary iminium perchlorates are used as synthetic equivalents for aliphatic and aromatic aldehydes in a complex one pot reaction, providing an easy access to terpyridines with peripheral substituents. According to the proposed reaction mechanism this is