ONCE DAILY TREATMENT OF HEPATITIS C WITH RIBAVIRIN AND TARIBAVIRIN
申请人:KADMON PHARMACEUTICALS LLC
公开号:US20140363396A1
公开(公告)日:2014-12-11
Hepatitis C is treated by administering once daily ribavirin, taribavirin, other derivatives or pharmaceutically acceptable salts thereof. Hepatitis C may also be treated by administering any of the foregoing compounds once daily in combination with interferon and/or direct-acting antivirals. Once daily dosage forms administered for treating hepatitis C may comprise between 800 mg and 1400 of ribavirin. Once daily dosage forms administered for treating hepatitis C may also comprise between 800 mg and 4000 mg of taribavirin.
[EN] PROCESS FOR PREPARING ANTIVIRAL NUCLEOSIDE DERIVATIVES<br/>[FR] PROCEDE D'OBTENTION DE DERIVES DE NUCLEOSIDES ANTIVIRAUX
申请人:HOFFMANN LA ROCHE
公开号:WO2005023827A1
公开(公告)日:2005-03-17
Process and novel intermediates for preparing 2-aminocarboxylic acid esters of the 5- hydroxymethyl group of levovirin (1-(3S, 4R-dihydroxy-5S-hydroxymethyl-tetrahydro furan-2S-yl)-IH-[1,2,4]triazole-3-carboxylic acid amide; Id: R1=R2 =R3 =H) and acid addition salts thereof. The present process provides the monoesters selectively in high purity with increased efficiency with reduced number of production steps. The process involves condensation of a cyclopentylidene levovirin compound with a N-urethane-N-carboxylic anhydride and subsequent deprotection to directly provide the hydrochloride salt of the product. The mono esters are useful for treatment of viral diseases and are absorbed more efficiently than the parent compound.