The synthesis and a study about the influence of the solvent in the alkylat
ion reaction of 2-Carboxy-6-chloro-9(10H) acridone (3b) and 2-Carboxy-6-chl
oro-7-nitro-9(10H) acridone (3a) was done, obtaining the N-ethyl ester deri
vative of the alkylated products. Using the liquid-liquid phase transfer ca
talysis only the N-alkylated derivative was obtained in both cases with an
improved yield.