Abstract: The present invention relates to methods of treating or preventing a viral infection using Compounds of Formula (I); or a pharmaceutically acceptable salt thereof, wherein A, B, R1, R2, R3, Q and V are as defined herein. The present invention also relates to compositions comprising a Compound of Formula (I).

Abstract: Compounds of Formula I: and pharmaceutically acceptable salts and co-crystals thereof are useful for the inhibition of HIV reverse transcriptase. The compounds may also be useful for the prophylaxis or treatment of infection by HIV and in the prophylaxis, delay in the onset or progression, and treatment of AIDS. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antiviral agents, immunomodulators, antibiotics or vaccines.

Abstract: The present invention is directed to deuterated 4?-substituted nucleoside derivatives of Formula I and their use in the inhibition of HIV reverse transcriptase, the prophylaxis of infection by HIV, the treatment of infection by HIV, and the prophylaxis, treatment, and delay in the onset or progression of AIDS and/or ARC.

Abstract: The present invention is directed carbocyclic nucleoside reverse transcriptase inhibitors compounds of Formula I and their use in the inhibition of HIV reverse transcriptase, the prophylaxis of infection by HIV, the treatment of infection by HIV, and the prophylaxis, treatment, and delay in the onset or progression of AIDS and/or ARC.

Abstract: The present invention is directed to a process for making Nucleoside Phosphoramidate Compounds of formula (I): which are useful for the treatment and prophylaxis of HCV infection. The present invention is also directed to compounds that are useful as synthetic intermediates for making the compounds of formula (I).

Abstract: Provided herein are compounds, compositions, and methods for the treatment of viral infections, for example, 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 are D-amino acid phosphoramidate halogeno pyrimidine nucleoside analog compounds which display remarkable efficacy and bioavailability for the treatment of, for example, HCV infection in a human. In certain embodiments, the compounds are of Formula I: or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form, or polymorphic form thereof, wherein: PD, X, R1, R2, RA, and RB are as described herein.

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 are 2?-cyano, azido or amino nucleosides according to Formula 1001 or 2001: or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form, or polymorphic form thereof, wherein Base, W, R1 and R2 are as described herein.

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 are 3?-substituted methyl or alkynyl nucleosides of Formula I: (I); or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form or polymorphic form thereof, wherein Base, PD, RA, RB1, RB2, RC and Z are as defined herein.

Abstract: Compounds of Formula I and pharmaceutically acceptable salts and co-crystals thereof are useful for the inhibition of HIV reverse transcriptase. The compounds may also be useful for the prophylaxis or treatment of infection by HIV and in the prophylaxis, delay in the onset or progression, and treatment of AIDS. The compounds and their salts can be employed as ingredients in pharmaceutical compositions, optionally in combination with other antiviral agents, immunomodulators, antibiotics or vaccines.

Abstract: Provided herein are compounds, compositions and methods for the treatment of liver cancer such as hepatocellular carcinoma, cholangiocarcinoma, or biliary tract cancer. In certain embodiments, compounds and compositions of nucleoside derivatives are disclosed, which can be administered either alone or in combination with other anti-cancer agents. In certain embodiments, the compounds are nucleoside analogs of Formula I: (I); or a pharmaceutically acceptable salt thereof, wherein Base, Z1, Z2, Z3, Z4, V, W, X, Ar, R1 and R2 are as described herein.

Abstract: Compounds of Formula I: and their pharmaceutically acceptable salts are useful for the inhibition of HIV reverse transcriptase. The compounds may also be useful for the prophylaxis or treatment of infection by HIV and in the prophylaxis, delay in the onset or progression, and treatment of AIDS.

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 are 1?,4?-thio nucleoside compounds which display remarkable efficacy and bioavailability for the treatment of, for example, HCV infection in a human. In certain embodiments, the compounds are of Formula 3001: or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form, or polymorphic form thereof; wherein Base, RA, RB, W, X, Y, and Z are as described herein.

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 are 4?-OR nucleosides of Formula I: or a pharmaceutically acceptable salt thereof, wherein Base, PD, R, Z1, Z2, Z3, and Z4 are as defined herein.

Abstract: The present invention relates to novel nucleoside derivatives, pharmaceutical compositions comprising the compounds, processes of preparation thereof, and methods of use thereof for treating cancer.

Abstract: A method and composition for treating a host infected with flavivirus or pestivirus comprising administering an effective flavivirus or pestivirus treatment amount of a described 1?, 2? or 3?-modified nucleoside or a pharmaceutically acceptable salt or prodrug thereof, is provided.

Abstract: The present invention is directed to a process for making Nucleoside Phosphoramidate Compounds of formula (I): which are useful for the treatment and prophylaxis of HCV infection. The present invention is also directed to compounds that are useful as synthetic intermediates for making the compounds of formula (I).

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 are 2?-dichloro or 2?-fluoro-2?-chloro nucleoside analogue compounds which display remarkable efficacy and bioavailability for the treatment of, for example, HCV infection in a human. In certain embodiments, the compounds are of Formula (I): or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form or polymorphic form thereof; wherein each of RA and RB is independently Cl or F, wherein at least one of RA and RB is Cl; and Base, PD and Z are as described herein.

Abstract: Provided herein are spray-dried particles comprising a 5,5-fused heteroarylene hepatitis C virus inhibitor compound and methods of their preparation. Also provided herein are pharmaceutical compositions comprising a 5,5-fused heteroarylene hepatitis C virus inhibitor compound, method of their preparation, and their use for treating or preventing hepatitis C virus infection.

Abstract: Provided herein are compounds, compositions, and methods for the treatment of cancer, including leukemia. In one embodiment, compounds and compositions of nucleoside derivatives are disclosed, which can be administered either alone or in combination with other anti-cancer agents.

Abstract: Provided herein are crystalline and salt forms of methyl N-{(1R)-2-[(2S)-2-{5-[4-(6-{2-[(2S)-1-{(2S)-2-[(methoxycarbonyl)amino]-3-methylbutanoyl} pyrrolidin-2-yl]-3H-benzimidazol-5-yl}thieno[3,2-b]thiophen-3-yl)phenyl]-1H-imidazol-2-yl}pyrrolidin-1-yl]-2-oxo-1-phenylethyl} carbamate, a Flaviviridae, including hepatitis C, virus inhibitor, pharmaceutical compositions comprising the compound, and processes of preparation thereof. Also provided are methods of its use for the treatment of a Flaviviridae, including HCV, infection in a subject in need thereof.