PROCESS FOR PRODUCING UNSATURATED ACYCLIC PHOSPHONATE DERIVATIVES OF PURINE AND PYRIMIDINE AND PHARMACEUTICAL COMPOSITIONS COMPRISING SAME AS ACTIVE INGREDIENT

摘要

Novel unsaturated acyclic phosphonate derivatives of certain purine or pyrimidines useful as antiviral agents, to methods and intermediates useful for their preparation and to their end-use application as antiviral agents effective against DNA viruses, retroviruses and viruses involved in tumor formation.