Fed'ko N. Synthesis and properties of ion active naphthalimide derivatives

A set of N-alkylnaphthalamic acids alkylammonium salts, being the intermediates of aminolysis of naphthalic anhydrides by primary amines in aprotic organic solvents, was isolated. These compounds convert into corresponding N-alkylnaphthalimides by heating or by alkaline reagent treatment. A number of tetraalkylammonium salts of naphthalimides were prepared for the first time. They can be transformed with good yields into N-alkylnaphthalimides and N,N?-bis-naphthalimides by reacting with alkylating agents at very mild conditions. N-Alkylnaphthalimides with N- and O-electron donating substituents in the positions 4 and 5 were obtained. Absorption and fluorescence spectra of the prepared compounds have been analysed determining possible fields of their application as fluorophores.