Abstract: Methods for forming 2-bromo, 2-fluoro ribofuranose intermediates and 2-chloro, 2-fluoro ribofuranose intermediates for use in preparing antiviral nucleosides are disclosed. Methods for forming nucleosides, and nucleoside prodrugs, using the intermediates, are also disclosed. The methods all produce intermediates, and the resulting nucleosides and prodrugs thereof, wherein the chirality of the carbon at the 2-position is controlled. In some embodiments, the chemistry involves using chiral auxiliaries, such as (R)-2,2-dimethyl-1,3-dioxolane-4-carbaldehyde, and in other embodiments, the chemistry involves using chiral starting materials, such as D-xylose.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing Flaviviridae family of viruses (including HCV, Yellow fever, Dengue, Chikungunya and West Nile virus), RSV, HEV, and influenza infection and cancer in human subjects or other animal hosts.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing Flaviviridae family of viruses (including HCV, Yellow fever, Dengue, Chikungunya Ebola and West Nile virus), RSV, HEV, and influenza infection and cancer in human subjects or other animal hosts.

Abstract: The compounds are of the class of N4-hydroxycytidine nucleosides, modified monophosphate and phosphonates prodrugs analogs, and pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof, useful in treating HCV or Norovirus infections.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing Flaviviridae family of viruses (including HCV, Yellow fever, Dengue, Chikungunya and West Nile virus), RSV, HEV, and influenza infection and cancer in human subjects or other animal hosts.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing Flaviviridae family of viruses (including HCV, Yellow fever, Dengue, Chikungunya and West Nile virus), RSV and influenza infection and cancer in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing cancer and viral infections, in particular, HIV, HCV, Norovirus, Saporovirus, HSV-1, HSV-2, Dengue virus, Yellow fever, and HBV in human patients or other animal hosts. The compounds are certain 6-substituted purine monophosphates, and pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof. In particular, the compounds show potent antiviral activity against HIV-1, HIV-2, HCV, Norovirus, Saporovirus, HSV-1, HSV-2, Dengue virus, Yellow fever, and HBV.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing HCV viral infections in human patients or other animal hosts.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing HCV viral infections in human patients or other animal hosts.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: Disclosed are compounds, compositions and methods for treating various diseases, syndromes, conditions and disorders, including pain. Such compounds are represented by Formula I as follows: wherein R1, Y, R2, R3, and Ra are defined herein.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing hepatitis C virus (HCV) infection in human subjects or other animal hosts. The compounds are as also pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof as pharmaceutical compositions and methods for treatment or prevention of HCV infection.

Abstract: Disclosed are compounds, compositions and methods for treating various diseases, syndromes, conditions and disorders, including pain. Such compounds are represented by Formula I as follows: wherein R1, R2, R3, Ra, and Y are defined herein.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing viral infections, in particular, HIV, and HBV, in human patients or other animal hosts. The compounds are 3?-azido-2?,3?-dideoxy purine monophosphates, and pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof. In particular, the compounds show potent antiviral activity against HIV-1 and HBV.

Abstract: The present invention is directed to compounds, compositions and methods for treating or preventing cancer and viral infections, in particular, HIV, HCV, Norovirus, Saporovirus, cytomegalovirus (CMV), herpes viruses (HSV-1, HSV-2), Dengue virus, Yellow fever, or HBV in human patients or other animal hosts. The compounds are certain N4-hydroxycytidine nucleosides derivatives, modified monophosphate and phosphonates prodrugs analogs, and pharmaceutically acceptable, salts, prodrugs, and other derivatives thereof. In particular, the compounds show potent antiviral activity against HIV-1, HIV-2, HCV, Norovirus, Saporovirus, cytomegalovirus (CMV), herpes viruses (HSV-1, HSV-2), Dengue virus, Yellow fever, and HBV.