Dihydropyran Derivatives of Secondary Aromatic Amines

摘要

3, 4-Dihydropyran has been found to form N-(2-tetrahydropyranyl) derivatives with a variety of secondary aromatic amines. The reaction is catalyzed by concentrated sulfuric acid. The structures of these compounds have been established by infrared, ultraviolet, and nuclear magnetic resonance spectroscopy. The derivatives are stable as solids and in basic solution, but are decomposed in the presence of alcohols by traces of acid to regenerate the amines.