• Ayyakannu Arumugam Napoleon Pharmaceutical Chemistry Division, School of Advanced Sciences, VIT University, Vellore, Tamil Nadu 632014, India
  • Gangadhara Angajala
  • Rakesh Kumar


Objective: The present work aimed at synthesis of process related impurities of valganciclovir by using gancyclovir or monobenzyl ganciclovir as starting material comprising the following steps.

Methods: Selective hydrolysis, reaction with coupling reagent followed by hydrolysis under basic conditions and hydrogenolysis in the presence of catalyst.

Results: The final synthesized compounds 2-((2-amino-6-oxo-1H-purin-9(6H)-yl)methoxy)-3-(benzyloxy)propyl acetate 2, 2-((2-amino-6-oxo-1H-purin-9(6H)-yl) methoxy)-3-hydroxy propyl acetate 3, 2-((2-amino-6-oxo-1H-purin-9(6H)-yl) methoxy) propane-1,3-diylbis (2((benzyloxy)carbonyl) amino)-3-methylbutanoate) 6, and 2-((2-amino-6-oxo-1H-purin-9(6H)-yl)methoxy)propane-1,3-diylbis(2-amino-3-methylbutanoate) 7 were sucessfully characterized by using FT-IR, 1H NMR and LC-MS.

Conclusion: The two processes related impurities (monoacetoxy ganciclovir, 3 and bis-valine ester of ganciclovir, 7) of valganciclovir hydrochloride were reported via the formation of key intermediates (acetoxy benzyl ganciclovir, 2 and bis-Cbz-valine ester of ganciclovir, 6)

Keywords: Valganciclovir, Ganciclovir, Antiviral, Acyclic nucleosides


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How to Cite

Napoleon, A. A., G. Angajala, and R. Kumar. “NOVEL SYNTHESIS OF PROCESS RELATED IMPURITIES OF VALGANCICLOVIR HYDROCHLORIDE”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 8, no. 4, Apr. 2016, pp. 29-31,



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