1328880-68-7Relevant academic research and scientific papers
Synthesis of the hepatitis B nucleoside analogue lagociclovir valactate
Brodszki, Martin,Baeckstroem, Birthe,Malmgren, Hakan,Wennerberg, Johan,Larsson, Torbjoern,Pelcman, Mikael,Waehling, Horst,Wallberg, Hans,Horvath, Karol
, p. 1027 - 1032 (2011)
2′,3′-Dideoxy-3′-fluoro-5-O-[(S)-(+)-2-(l-valyloxy) -propionyl guanosine (lagociclovir valactate) is a prodrug of 3′-fluoro-2′,3′-dideoxyguanosine with high oral bioavailability in humans and potent activity against hepatitis B virus (HBV). A five-step synthesis of lagocyclovir valactate starting from 2-amino-6-chloropurine is described. The synthesis was performed at kilogram scale, and the target nucleoside prodrug was isolated as the hemisulphate salt with an overall yield of 23%. The major challenges were N-glycosylation of a 2-deoxyfluorosugar, which required separation of α- and β-anomers, and deprotection of the penultimate intermediate by hydrogenation.
