Reactions of Pyrylium Salts with Nitrogen-containing Nucleophiles

Abstract

New data on reactions of pyrylium salts with nitrogen-containing nucleophiles, occurring both with retention of the pyryliumring and with recyclisation, are considered. The extensive possibilities for the employment of pyrylium salts in the synthesisof many functional compounds of the aliphatic and aromatic series and of different nitrogen- and oxygen-containing three-,five-, six-, and seven-membered heterocycles, including condensed heterocycles, are demonstrated. The bibliography includes 184 references.