Our aim was to study the aromatic nucleophilic substitution between the sodium anion of diethylphosphite and several halogenated substrates like: iodo-anilines, iodo-nitrobenzenes, bromo- and iodopyridines, bromoquinoline. Two coupling processes have been evaluted. The first one is the photostimulated nucleophilic substitution (SRN1), the second the promoted arylation by transition metals. We obtain good results with the first method which is efficient and simple; by contrast the second one has given only few positive results. We describe five aromatic aminophosphonic acids.