Silica‐supported Solvent Approaches More Facile than the Conventional for Erlenmeyer Synthesis with Our Pyridinium Salts

The synthesis of pyridinium salts by both conventional/silica‐supported muffle furnace and microwave approaches is described. We have optimized the Erlenmeyer synthesis of azalactone with various concentrations of our synthesized pyridinium salts. Among these, bromide‐containing pyridinium salts showed excellent catalytic activity than the others.