Condensation Products Derived from Diphenic Anhydrides with 1, 2-, 1, 8- and 2, 3-Naphthylenediamines

Abstract

Condensation products derived from diphenic anhydride or its chloro derivatives with 1, 2-, 1, 8- and 2, 3-naphthylenediamines were studied.
New yellow perinone type pigments were preferably obtained by the condensation of diphenic anhydrides with naphthylenediamines in boiling quinoline, while perimidine type intermediates were formed by the reaction of these anhydrides with the diamines in boiling acetic acid.
The structures of these intermediates were determined spectroscopically.
The effect of chlorine substitution on shade of pigments was bathochromic. It was found from light- and solvent-fastness tests that the chlorine substitution has a favorable effect.