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Aminoalkyl phosphoramidates were obtained by either direct phosphorylation of symmetric diamines or a three steps method analogue to Gabriel's synthesis and coupled to a 4-oxoquinoline acyclonucleoside, in order to synthesize 4- oxoquinolone phosphoramidates. Two unpublished compounds demonstrated low cytotoxity in comparison to Acyclovir and good HSV-1 cytophatic effects on Acyclovir resistant strains.