Patent ID: 8492537

Claim:
A nucleoside of the general formula I wherein R 1 =halogen, R 2 is selected from the group consisting of H, halogen, OR 8 , CN, N 3 , and NR 6 R 7 , R 3 ═H, straight-chain or branched C 1 -C 8 alkyl, or straight-chain or branched C 2 -C 8 alkylene, R 4 ═H, halogen, OR 8 , N 3 , or NR 6 R 7 , or R 4 together with R 1 represent a second bond between the C-atoms adjacent to R 1 and R 4 , R 5 ═H, C 1 -C 8 alkyl or aryl, R 6 and R 7 , independently of each other, are H, straight-chain or branched C 1 -C 8 alkyl or acetyl, and R 8 is a straight-chain or branched C 1 -C 8 alkyl.