Abstract: Provided herein are methods of preparation of I by reacting i with acid where R1 and R2 are each independently a leaving group. Intermediates to make i are also claimed.

Abstract: Provided herein are methods of preparation of I by reacting i with acid where R1 and R2 are each independently a leaving group. Intermediates to make i are also claimed.

Abstract: Provided herein are compounds, compositions and methods for the treatment of Flaviviridae infections, including HCV infections. In certain embodiments, compounds and compositions of nucleoside derivatives are disclosed, which can be administered either alone or in combination with other anti-viral agents. In certain embodiments, the compounds comprise two 2?-methyl nucleotides linked according to Formula I: N1-L-N2??(I) or a pharmaceutically acceptable salt, ester, solvate, stereoisomer, isomeric form, tautomeric form or polymorphic form thereof; wherein N1, L and N2 are as described herein.