Abstract: Provided are compounds of Formula I: nucleosides, nucleoside phosphates and prodrugs thereof, wherein R6 is CN, ethenyl, 2-haloethen-1-yl, or (C2-C8)-alkyn-1-yl. The compounds, compositions, and methods provided are useful for the treatment of Flaviviridae virus infections.

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: Compounds and compositions of Formula I are described, useful as anti-proliferative agents, and in particular anti-HPV, wherein: Y1A and Y1B are independently Y1; RX1 and RX2 are independently RX; Y1 is ?O, —O(RX), ?S, —N(RX), —N(O)(RX), —N(ORX), —N(O)(ORX), or —N(N(RX)(RX)); RX is independently R1, R2, R4, W3, or a protecting group; R1 is independently —H or alkyl of 1 to 18 carbon atoms; R2 is independently R3 or R4 wherein each R4 is independently substituted with 0 to 3 R3 groups or taken together at a carbon atom, two R2 groups form a ring of 3 to 8 carbons and the ring may be substituted with 0 to 3 R3 groups; R3 is R3a, R3b, R3c or R3d, provided that when R3 is bound to a heteroatom, then R3 is R3c or R3d; R3a is —H, —F, —Cl, —Br, —I, —CF3, —CN, N3, —NO2, or —OR4; R3b is ?O, —O(R4), ?S, —N(R4), —N(O)(R4), —N(OR4), —N(O)(OR4), or —N(N(R4)(R4)); R3c is —R4, —N(R4)(R4), —SR4, —S(O)R4, —S(O)2R4, —S(O)(OR4), —S(O)2(OR4), —OC(R3b)R4, —OC(R3b)OR4, —OC(R3b)(N(R4)(R4)), —SC(R3b)R4, —SC(R3b)OR4, —SC(R3b)(

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: Provided are compounds of Formula I: and pharmaceutically acceptable salts and esters thereof. The compounds, compositions, and methods provided are useful for the treatment of Flaviviridae virus infections, particularly hepatitis C infections.

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: Provided are methods for treating Orthomyxoviridae virus infections by administering ribosides, riboside phosphates and prodrugs thereof, of Formula I: wherein R2 is halogen. The compounds, compositions, and methods provided are particularly useful for the treatment of Human Influenza virus infections.

Abstract: The present application includes novel inhibitors of HCV, compositions containing such compounds, therapeutic methods that include the administration of such compounds.

Abstract: The invention is related to pyrimidine-2,4-dione HIV reverse transcriptase inhibitors of Formula (I), (II), or (III): or a pharmaceutically acceptable salt, thereof, compositions containing such compounds, and therapeutic methods that include the administration of such compounds.

Abstract: Provided are prodrugs of pyrrolo[1,2-f][1,2,4]triazin-7-yl nucleoside phosphates wherein the 1? position of the nucleoside sugar is substituted with CN. The compounds, compositions, and methods provided are useful for the treatment Hepatitis C infections.

Abstract: Provided are select imidazo[1,2-f][1,2,4]triazinyl nucleosides, nucleoside phosphates and prodrugs thereof, wherein the 2? position of the nucleoside sugar is substituted with halogen and carbon substituents. The compounds, compositions, and methods provided are useful for the treatment of Flaviviridae virus infections, particularly hepatitis C infections caused by both wild type and mutant strains of HCV.

Abstract: Compounds and compositions of Formula I are described, useful as anti-proliferative agents, and in particular anti-HPV, wherein: Y1A and Y1B are independently Y1; RX1 and RX2 are independently RX; Y1 is ?O, —O(RX), ?S, —N(RX), —N(O)(RX), —N(ORX), —N(O)(ORX), or —N(N(RX)(RX)); and pharmaceutically acceptable salts thereof.

Abstract: The invention is related to anti-viral compounds, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: Provided are pyrrolo[1,2-f][1,2,4]triazinyl, imidazo[1,5-f][1,2,4]triazinyl, imidazo[1,2-f][1,2,4]triazinyl, and [1,2,4]triazolo[4,3-f][1,2,4]triazinyl nucleosides, nucleoside phosphates and prodrugs thereof, wherein the 1? position of the nucleoside sugar is substituted. The compounds, compositions, and methods provided are useful for the treatment of Flaviviridae virus infections, particularly hepatitis C infections.

Abstract: The invention is related to phosphorus substituted compounds with antiviral activity, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.

Abstract: Provided are processes and intermediates for the syntheses of nucleosides of pyrrolo[1,2-f][1,2,4]triazinyl and imidazo[1,24][1,2,4]triazinyl heterocycles of Formula I.

Abstract: The invention is related to phosphorus substituted compounds with antiviral activity, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds.