Intermediate to HCV-Nucleoside Inhibitors

A compound of formula Inaznačeno wherein: R1, R2 and R3 are independently selected from the group consisting of hydrogen, CO R 4, C (= O) OR 4 and C (= O) CHR5NHR6; or R 1 and R 3 are H and R 2 is a monophosphate, diphosphate or triphosphate ester; R4 is independently selected from the group consisting of (a) C 1-18 unbranched or branched alkyl, (b) C1-18 haloalkyl, (c) C3-8 cycloalkyl, (d) S1-10 heteroalkyl and (e) phenyl, wherein said phenyl is optionally substituted with one to three groups independently selected from the group consisting of C1-3 alkyl, C1-3 alkoxy, halogen, cyano or nitro; R5 is hydrogen, C1-10 alkyl, phenyl or C1-3 phenylalkyl, where said phenyl izbornosupstituisan with one to three groups independently selected from the group consisting činehalogen, hydroxy, C1-3 alkoxy, C1-3 alkyl, cyano and nitro; R6 is hydrogen or C1-6 alkoxy; or an acid addition salt soli.Prijava further comprises 18 claims.