Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/12—Antivirals
  • A61P31/14—Antivirals for RNA viruses
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
  • A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
  • A61K31/7052—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides
  • A61K31/706—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom
  • A61K31/7064—Compounds having saccharide radicals and heterocyclic rings having nitrogen as a ring hetero atom, e.g. nucleosides, nucleotides containing six-membered rings with nitrogen as a ring hetero atom containing condensed or non-condensed pyrimidines
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
  • C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
  • C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
  • C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
  • C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
  • C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
  • C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
  • C07H19/06—Pyrimidine radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
  • C07H19/00—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof
  • C07H19/02—Compounds containing a hetero ring sharing one ring hetero atom with a saccharide radical; Nucleosides; Mononucleotides; Anhydro-derivatives thereof sharing nitrogen
  • C07H19/04—Heterocyclic radicals containing only nitrogen atoms as ring hetero atom
  • C07H19/06—Pyrimidine radicals
  • C07H19/10—Pyrimidine radicals with the saccharide radical esterified by phosphoric or polyphosphoric acids

Definitions

• the invention belongs to the field of medicinal chemistry, and particularly relates to a novel class of nucleoside phosphoramidate compounds, a composition containing the nucleoside phosphoramidate compound, and the use of the compound or composition as a therapeutic agent for viral infectious diseases, in particular It is used as a therapeutic drug for viral hepatitis.
• Hepatitis C virus (HCV) infection is a worldwide disease. The number of chronically infected people worldwide has exceeded 200 million. The chronic infection rate in Egypt is 15%, in Pakistan, 4.8%, and in China, 3.2%. The top three in the world.
• the clinical manifestations of hepatitis C virus infection are diverse, ranging from inflammation to cirrhosis and liver cancer.
• Chronic hepatitis C can also be associated with certain extrahepatic manifestations, including rheumatoid arthritis, dry conjunctival keratitis, lichen planus, glomerulonephritis, mixed cryoglobulinemia, B-cell lymphoma, and late onset Skin porphyria, etc., may be caused by abnormal immune response in the body.
• various complications such as ascites abdominal infection, upper gastrointestinal bleeding, hepatic encephalopathy, liver and kidney syndrome, liver failure and other symptoms may occur.
• HCV belongs to the Flaviviridae virus, which is similar in gene structure to the other two genera of the Flaviviridae, the genus Pestivirus and Flavivirus.
• standard methods of treating HCV infection are interferon and combination therapy with interferon and ribavirin.
• interferon had significant side effects such as influenza-like symptoms, weight loss, and fatigue, while interferon and ribavirin combination therapy produced considerable Side effects, including hemolysis, anemia, and fatigue.
• drugs developed to treat HCV infection include protease inhibitors, thiazolidine derivatives, thiazolidine and n-benzoanilide, phenanthrenequinone, helicase inhibitor, nucleoside polymerase inhibitor and colloidal Toxins, antisense phosphorothioate oligonucleotides, inhibitors of IRES-dependent translation, ribozymes, and nucleoside analogs, and the like.
• nucleoside phosphate compounds for the treatment of Flaviviridae viruses, especially HCV infections, is an important research and development direction in the field.
• W0 2006/065335 discloses a fluorinated pyrrolo[2,3,d]pyrimidine nucleoside compound which inhibits HCV virus.
• US 2006/0241064 discloses nucleoside compounds for the treatment of viral infections caused by Flaviviridae family viruses such as HCV.
• W0 2008/121634 discloses nucleoside phosphoramidate compounds for use in the treatment of viral infections in mammals.
• R 2 is selected from halogen
• R 3 is selected from the group consisting of 0H, H, d- 4 alkoxy
• R 4 is selected from the group consisting of H, d- 6 alkyl, halogenated C M alkyl;
• R 5 is selected from the group consisting of d- 6 alkyl, halogenated C M alkyl;
• R 6 is selected from the following
• phenyl-Y- wherein Y is absent or selected from the group consisting of d alkyl, C 2 -6 alkenyl, C 2 -6 alkynyl, C 2 - 6 alkenyl-(C0)-, C 2 - 6 Alkynyl-(C0)-, 0, S, amino and ⁇ (( 6 alkyl), wherein phenyl is optionally thiol, halogen, nitro, d alkoxy, cyano, C 2 - 6 One or more of alkenyl, C 2 -6 alkynyl, d acylamino, halo d decyl, halo d alkoxy, amino, fluorenyl (( 6 alkyl) ⁇ ( -6 alkyl NHC0) a substituted or phenyl group together with a five-membered or six-membered ring constitutes a benzo five-membered ring or a benzo six-membered
• Y is absent or selected from the group consisting of d alkyl, C 2 - 6 alkenyl, C 2 - 6 alkynyl, C 2 - 6 alkenyl-(C0)-, C 2 - 6 alkynyl-(C0)-, 0, S, amino and - ⁇ ((- 6 alkyl) or heterocyclic groups attached thereto
• heterocyclic group is optionally a d alkyl group, a halogen, a nitro group, a d alkoxy group, a cyano group, a C 2 - 6 alkenyl group, a C 2 - 6 alkynyl group, a d acylamino group, One or more substitutions of a halogenated d alkyl group, a halogenated d alkoxy group, an amino group, a Wd fluorenyl group 2, and an alkyl NHC0;
• R 7 is selected from the group consisting of H, halogen, d alkyl, halo d alkyl, d alkoxy, halo d alkoxy, N0 2 ,
• CN d- 6 alkyl-NH-C0-, hydroxy, mono C M alkylamino, di d 6 alkylamino, C M alkyl-S -, C 2 - 6 alkenyl-S -, C 2 - alkyne group -S -, group homes - S0_, C 2 - alkenyl _so_, C 2 - alkynyl _S0_, group homes - so 2 _, C 2 - alkenyl - S0 2 -, C 2 - 6 alkynyl group - S0 2 -, d- 6 alkyl- oso 2 -, c 2 - 6 alkenyl-oso 2 -, c 2 - 6 alkynyl-oso 2 - ;
• R 6 and R 7 together with the attached benzene ring form a benzo five-membered ring or a benzo six-membered ring, said benzo
• the five-membered ring and the benzo six-membered ring may be halogen, d-6 alkyl, d-6 alkoxy, halogenated d-6 alkyl, halogenated d-6 decyloxy, phenyl, cyano, d -6 alkyl _0C (0) -, d- 6 alkyl -0C (0) -CH 2 - substituted with one or more.
• Another object of the present invention is to provide a process for the preparation of the nucleoside phosphoramidate compound of the formula I of the present invention and its stereoisomers, salts, hydrates, solvates or crystals.
• a further object of the present invention is to provide a composition comprising a nucleoside phosphoramidate compound of the formula I of the present invention and a stereoisomer, salt, hydrate, solvate or crystalline and pharmaceutically acceptable carrier thereof, and A composition comprising a nucleoside salt, hydrate, solvate or crystal of the formula I of the invention and another antiviral agent.
• a further object of the present invention is to provide a nucleoside phosphoramidate compound of the formula I of the present invention and a stereoisomer, salt, hydrate, solvate or crystallization thereof for treating and/or preventing hepatitis C virus infection. And the use of the nucleoside phosphoramidate compound of the formula I of the present invention and stereoisomers, salts, hydrates, solvates or crystals thereof for the preparation of a medicament for the treatment and/or prevention of hepatitis C virus infection .
• the present invention provides the following technical solutions:
• the present invention provides a novel nucleoside phosphoramidate compound of the formula I and stereoisomers, salts, hydrates, solvates or crystals thereof:
• d-6 alkyl preferably, selected from d- 3 alkyl; further preferably, (3 ⁇ 4;
• R 2 is selected from halogen; preferably, R 2 is F;
• R 3 is selected from the group consisting of 0H, H, d- 4 alkoxy; preferably, selected from 0H, H, methoxy; further preferably, 0H;
• R 4 is selected from H, d- 6 alkyl, halogenated d- 6 alkyl; preferably, R 4 is selected from H, d- 6 alkyl; further preferably, R 4 is selected from H and d - 4 alkyl;
• R 5 is selected from d-6 alkyl, halo CM alkyl; preferably, R 5 is selected from d-6 alkyl; further preferably,
• R 6 is selected from:
• phenyl-Y- wherein Y is absent or selected from d-6 alkyl, C 2 - 6 alkenyl, C 2 - 6 alkynyl, C 2 - 6 ene Group _ (C0) -, C 2 - 6 alkynyl group _ (C0) -, 0, S, and amino _ ⁇ ((6 alkyl), wherein the phenyl is optionally substituted ⁇ alkyl, halo, nitro, d -6 alkoxy, cyano, C 2 -6 alkenyl, C 2 -6 alkynyl, d-6 acylamino, halo d-6 alkyl, halo d-6 alkoxy, amino, hydrazine (- 6 alkyl) ⁇ (one or more substitutions in - 6 alkyl NHC0 or a phenyl group together with a five or six membered ring to form a benzo five-membered ring or a be
• Y is absent or selected from the group consisting of d-6 alkyl, C 2 - 6 alkenyl, C 2 - 6 alkynyl, C 2 - 6 alkenyl (C0)-, C 2 - 6 alkynyl _(C0)-, 0, S, amino and - fluorene (( -6 alkyl) or heterocyclic group attached thereto
• heterocyclic group is optionally a d-6 alkyl group, a halogen, a nitro group, a d-6 alkoxy group, a cyano group, a C 2 - 6 alkenyl group, a C 2 - 6 alkynyl group, One or more substitutions of d-6 acylamino, halo d-6 alkyl, halo d-6 alkoxy, amino, fluorenyl (( 6 alkyl) 2 and d-6 alkyl NHC0;
• R 6 is selected from
• phenyl-Y- wherein Y is absent or selected from d- 4 alkyl, C 2 -4 alkenyl, C 2 -4 alkynyl, (: 2 - 4 alkenyl) (C0)-, C 2--4 alkynyl group _ (C0) -, 0, S, and amino _ ⁇ ((4-alkyl), wherein the phenyl is optionally substituted d- 4-alkyl, halo, nitro, d- 4 alkoxy, Cyano, C 2 - 4 alkenyl, C 2 - 4 alkynyl, d - 4 acylamino, halo d - 4 alkyl, halo d - 4 alkoxy, amino, N (d - 4 alkyl)
• Y is absent or selected from d- 4 alkyl, C 2 -4 alkenyl, C 2 -4 alkynyl, (: 2 - 4 alkenyl) (C0)-,
• Y is absent or selected from the group consisting of d- 4 alkyl, C 2 -4 alkenyl, C 2 -4 alkynyl, C 2 - 4 alkenyl(C0)-, C 2 - 4 alkynyl _(C0)-, 0, S, amino and -N(d- 4 alkyl) or a heterocyclic group to which Y is bonded to form a bicyclic heterocyclic ring, wherein the heterocyclic group is optionally d- 4- alkyl, halogen, nitro, d- 4 alkoxy, cyano, C 2 -4 alkenyl, C 2 -4 alkynyl, d- 4 acylamino, halogenated d- 4 alkyl, halogenated d --4 alkoxy, amino, N (d- 4 alkyl) 2 and d- 4 alkyl NHC0 one or more substituents;
• alkyl group is optionally selected from the group consisting of d- 4 alkyl, halogen, nitro, d- 4 alkoxy, cyano, C 2 -4 alkenyl, C 2 -4 alkynyl, d - 4 acylamino, halo d -
• R 6 is selected from the group consisting of
• phenyl, phenyl-d- 3 , - phenyl-C 2 -3 alkenyl-, phenyl-C 2 -3 alkynyl, phenyl - 0, phenyl-S -, phenyl -NH- and phenyl-indole (( -3 alkyl)-, phenyl-ethylene-(C0)-, naphthyl-ethylene-(C0)-, wherein the phenyl group is optionally ( -4 alkyl) , halogen, nitro, d- 4 alkoxy, cyano, C 2 - 4 alkenyl, (: 2 - 4 alkynyl, d - 4 acylamino, halogenated d - 4 alkyl, halogenated d - 4 Alkoxy, amino, N(d- 4 alkyl) 2 and d- 4 alkyl
• substitutions in the NHCO or a phenyl phen
• R 6 is selected from:
• [3,2-b]thienyl_ ,,1H-imidazolyl-indole-, 1,2,4-triazolyl-indole-, 1,2,3-triazolyl-indole-, thiazole Base- ⁇ , 1, 2, 3-thiadiazolyl- ⁇ -, 1,2, 4-thiadiazolyl- ⁇ -, 1,3,4- Thiadiazolyl-indole-, oxazolyl-indole-, 1, 2, 4-oxadiazolyl-indole-, 1, 2, 3-oxadiazolyl-indole-, 1, 3, 4 oxazolyl - ⁇ -, pyrimidinyl - ⁇ -, pyrazinyl - ⁇ -, pyridazinyl - ⁇ -, quinoxalinyl - ⁇ -, 4H- chromen-4-one-yl - ⁇ -, pyridyl - ⁇ -, thieno [3,
• (7) selected from the group consisting of H, halogen, d-6 alkyl, halogenated d-6 alkyl, d-6 alkoxy, halogenated d-6 alkoxy, N0 2 ,
• R 7 is selected from the group consisting of H, halogen, d- 4 alkyl, halogenated d- 4 alkyl, d- 4 alkoxy, halogenated d - 4 alkoxy, N0 2 , CN, d- 4 alkyl-NH-C0-;
• R 6 and R 7 together with the attached benzene ring form a benzo five-membered ring or a benzo six-membered ring
• the benzo five-membered ring and the benzo six-membered ring may be halogen, d-6 Alkyl, d-6 alkoxy, halo d-6 alkyl, halo d-6 alkoxy, phenyl, cyano, d-6 alkyl_0C(0)-, alkyl-0C ( 0) one or more substitutions in -CH 2 -;
• R 6 , R 7 together with the attached benzene ring form 1,2,3,4-tetrahydronaphthalene, 2,3-dihydro- 111 - hydrazine, hydrazine, benzofuran, quinoxaline, 4H-chromen-4-one, benzo[d]isoxazole, benzo[d]oxazole, benzo[c] [l
• the invention provides a compound of formula I, and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein methyl, ethyl, propyl or isopropyl is F , R 3 is a book, H or methoxy, 11, methyl, ethyl, n-propyl or isopropyl, R 5 is methyl, ethyl, n-propyl, isopropyl, n-butyl, Isobutyl or tert-butyl, R 6 is phenyl-Y- or heterocyclyl-Y-, wherein Y is absent or selected from 3- mercapto, C 2 -3 alkenyl, C 2 -3 alkynyl, C 2 —3 alkenyl —(C0) —, C 2 —3 alkynyl —(C0) —, 0, S, amino and — ⁇ (( -3 alkyl) or wherein the phen
• the inventors of the present invention have surprisingly found that when the R 6 group of formula I, especially selected from phenyl-Y- or heterocyclyl-Y-, is in the para position to the oxy group attached to the phenyl ring to which it is attached Or meta-compounds are very excellent Anti-HCV virus activity. Without wishing to be bound by the present theory, the inventors of the present invention believe that the R 6 group of formula I, especially when selected from phenyl-Y- or heterocyclyl-Y-, is in phenyl-Y-benzene.
• the phenyl-Y- or heterocyclic group -Y- and -0- on the phenyl ring are excellent in the para or meta position. Anti-HCV virus activity.
• the invention provides a compound of formula I, and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein methyl or ethyl, is F, R 3 is OH or H, R 4 is H, methyl or ethyl, R 5 is methyl, ethyl, n-propyl or isopropyl, and R 6 is phenyl-Y-, wherein Y is absent or selected from d- 3 Alkyl, C 2 -3 alkenyl, C 2 -3 alkynyl, C 2 -3 alkenyl (C0) -, C 2 -3 alkynyl-(co)-, wherein phenyl is optionally ( ⁇ 3 Alkyl, halogen, nitro, d- 3 alkoxy, cyano, C 2 -3 alkenyl, C 2 -3 alkynyl, d- 3 acylamino, halo d- 3 alkyl, halogenated
• the present invention provides a compound of the formula I and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein the methyl group is F, and R 3 is 0H, which is 11. Methyl or ethyl, R 5 is methyl, ethyl, n-propyl or isopropyl, R 6 is phenyl-Y-, wherein Y is absent or selected from d- 3 fluorenyl, C 2 - 3 Alkenyl, C 2 -3 alkynyl, C 2 -3 alkenyl (C0) -, C 2 -3 alkynyl - (C0) - wherein phenyl is optionally d- 3 alkyl, halogen, nitro , d- 3 alkoxy, halo d- 3 alkyl, halo d- 3 alkoxy, cyano, C 2 -3 alkenyl, C 2 -3 alkynyl,
• the invention provides a compound of formula I, and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein is methyl, is F, R 3 is 0H, is 11 or Methyl, isopropyl, R 6 is phenyl-Y -, wherein Y is absent or selected from d- 3 alkyl, C 2 -3 alkenyl, C 2 -3 alkynyl, C 2 -3 Base —(C0) -, C 2 -3 alkynyl-(C0) _, wherein phenyl is optionally substituted by ( ⁇ 3 alkyl, halogen, nitro, d- 3 alkoxy, halo d- 3 alkyl , one or more substitutions of a halogenated d- 3 alkoxy group, a cyano group and a d- 3 alkyl NHC0 or a phenyl group together with an oxazole, pyrazine or
• the invention provides a compound of formula I and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein R 6 is phenyl or benzyl, preferably, said benzene
• R 6 is phenyl or benzyl, preferably, said benzene
• the benzyl or benzyl group is in the para or meta position to the oxy group on the phenyl ring to which it is attached.
• the present invention according to formula I of the compounds and stereoisomers, salts, hydrates, solvates or crystalline, wherein R 6 is heterocyclyl -Y-, wherein said heterocycle Furan Base, pyrrolyl, tetrazole, furazan, oxadiazole, pyran, thiopyran, piperidine, triazine, oxazine, and the like.
• R 6 is heterocyclyl -Y-, wherein said heterocycle Furan Base, pyrrolyl, tetrazole, furazan, oxadiazole, pyran, thiopyran, piperidine, triazine, oxazine, and the like.
• R 6 is selected from:
• phenyl-Y- wherein hydrazine is absent or selected from the group consisting of d alkyl, C 2 - 6 alkenyl, C 2 - 6 alkynyl, C 2 - 6 alkenyl-(C0)-, C 2 - 6 Alkynyl-(C0)-, 0, S, amino and ⁇ (( 6 alkyl), wherein phenyl is optionally thiol, halogen, nitro, d alkoxy, cyano, C 2 - 6 One or more of alkenyl, C 2 -6 alkynyl, d acylamino, halo d decyl, halo d alkoxy, amino, fluorenyl (( 6 alkyl) ⁇ ( -6 alkyl NHC0) a substituted or phenyl five- or six-membered ring together to form a benzene five-membered ring or a benzo six-membered
• Y is absent or selected from the group consisting of d alkyl, C 2 - 6 alkenyl, C 2 - 6 alkynyl, C 2 - 6 alkenyl-(C0)-, C 2 - 6 alkynyl-(C0)-, 0, S, amino and - ⁇ ((- 6 alkyl) or heterocyclic groups attached thereto
• heterocyclic group is optionally a d alkyl group, a halogen, a nitro group, a d alkoxy group, a cyano group, a C 2 - 6 alkenyl group, a C 2 - 6 alkynyl group, a d acylamino group, One or more substitutions of a halogenated d alkyl group, a halogenated d alkoxy group, an amino group, a Wd fluorenyl group 2, and an alkyl NHC0;
• R 6 is selected from the group consisting of:
• phenyl-Y- wherein Y is absent or selected from d- 4 alkyl, C 2 -4 alkenyl, C 2 -4 alkynyl, (: 2 - 4 alkenyl) (C0)-, C 2--4 alkynyl group _ (C0) -, 0, S, and amino _ ⁇ ((4-alkyl), wherein the phenyl is optionally substituted d- 4 Huan, halogen, nitro, d- 4 alkoxy, Cyano, C 2 -4 alkenyl, C 2 -4 alkynyl, d - 4 acylamino, halo d - 4 fluorenyl, halo d - 4 alkoxy, amino, N (d - 4 alkyl)
• Y is absent or selected from d- 4 alkyl, C 2 -4 alkenyl, C 2 -4 alkynyl, (: 2 - 4 alkenyl) (C0)-, C
• Y is absent or selected from the group consisting of d- 4 alkyl, C 2 -4 alkenyl, C 2 -4 alkynyl, C 2 - 4 alkenyl(C0)-, C 2 - 4 alkynyl _(C0)-, 0, S, amino and -N(d- 4 alkyl) or a heterocyclic group to which Y is bonded to form a bicyclic heterocyclic ring, wherein the heterocyclic group is optionally d- 4- alkyl, halogen, nitro, d- 4 alkoxy, cyano, C 2 - 4 alkenyl, C 2 -4 alkynyl, d - 4 acylamino, halo d - 4 alkyl, halo d - 4 alkoxy, amino, N(d- 4 alkyl) 2 and d - one or more substitutions in the 4 alkyl NHC0;
• alkyl group is optionally selected from the group consisting of d- 4 alkyl, halogen, nitro, d- 4 alkoxy, cyano, C 2 -4 alkenyl, C 2 -4 alkynyl, d - 4 acylamino, halo d -
• R 6 is selected from the group consisting of
• R 6 is selected from:
• [3,2-b]thienyl_ ,,1H-imidazolyl-indole-, 1, 2,4-triazolyl-indole-, 1, 2, 3-triazolyl-indole-, thiazole Base- ⁇ -, 1, 2, 3-thiadiazolyl-indole-, 1, 2, 4-thiadiazolyl-indole-, 1, 3,4-thiadiazolyl-indole-, oxazolyl - ⁇ -, 1, 2, 4-oxadiazolyl-indole-, 1, 2, 3-oxadiazolyl-indole-, 1, 3,4 oxadiazolyl-indole-, pyrimidinyl-indole , pyrazinyl - ⁇ -, pyridazinyl - ⁇ -, quinoxalinyl - ⁇ -, 4H- chromen-4-one-yl - ⁇ -, pyridyl - ⁇ -
• R 7 is selected from the group consisting of H, halogen, d-6 alkyl, halo d-6 alkyl, d-6 alkoxy, halo d-6 alkoxy, N0 2 ,
• R 7 is selected from the group consisting of H, halogen, d- 4 alkyl, halogenated d- 4 alkyl, d- 4 alkoxy, halogenated d- 4 Alkoxy, N0 2 , CN, d- 4 alkyl-NH-C0-; further preferably, R 7 is selected from the group consisting of H, fluorine, chlorine, methyl, ethyl, n-propyl, isopropyl, fluoro , difluoromethyl, trifluoromethyl, fluoroethyl, difluoroethyl, trifluoroethyl, methoxy, ethoxy, n-propoxy, isopropoxy, fluoromethoxy, Difluoromethoxy, trifluoromethoxy, fluoroethoxy, difluoroethoxy, trifluoroethoxy, 2 , CN, CH alkyl
• R 6 and R 7 together with the attached benzene ring form a benzo five-membered ring or a benzo six-membered ring
• the benzo five-membered ring and the benzo six-membered ring may be halogen, d-6 Alkyl, d-6 alkoxy, halo d-6 alkyl, halo d-6 alkoxy, phenyl, cyano, d-6 alkyl_0C(0)-, alkyl-0C ( 0) one or more substitutions in -CH 2 -; preferably, R 6 , R 7 together with the attached benzene ring form 1,2,3,4-tetrahydronaphthalene, 2,3-dihydro-111 - hydrazine, hydrazine, benzofuran, quinoxaline, 4H-chromen-4-one, benzo[d]isoxazole, benzo[d]oxazole, benzo[c] [l,2,
• the present invention provides a compound of the formula la and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein R 6 is phenyl-Y- or heterocyclyl-Y-, Wherein Y is absent or is selected from the group consisting of 3 fluorenyl, C 2 -3 alkenyl, C 2 - 3 alkynyl, C 2 - 3 alkenyl (C0)-, C 2 - 3 alkynyl _(C0)-, 0, S, amino and _ ⁇ (( -3 alkyl), wherein the phenyl or heterocyclic group is optionally d- 3 alkyl, halogen, nitro, d- 3 alkoxy, cyano, C 2 - 3 alkenyl, C 2 -3 alkynyl, d- 3 acylamino, halo d- 3 alkyl, halo d- 3 alkoxy, amino, NH(d- 3 alkyl
• R 6 is 1H-imidazolyl, 1, 2, 4-triazolyl, 1, 2 , 3-triazolyl, thiazolyl, 1, 2, 3-thiadiazolyl, 1, 2, 4-thiadiazolyl, 1, 3, 4-thiadiazolyl, oxazolyl, 1, 2,4-oxadiazolyl, 1, 2, 3-oxadiazolyl, 1,3,4oxadiazolyl, pyrimidinyl, pyrazinyl, pyridazinyl, quinoxalinyl, 4H-chromene 4-keto, thieno[3,2-b]thienyl, 1H-imidazolyl-(CH 2 )-, 1, 2, 4-triazolyl-(CH 2 )-, 1, 2, 3 - Triazolyl-((3 ⁇ 4)-, thiazolyl-((3 ⁇ 4)-, 1,2, 3-thiadiazol
• [3,2-b]thienyl_ ,,1H-imidazolyl-indole-, 1,2,4-triazolyl-indole-, 1,2,3-triazolyl-indole-, thiazole Base- ⁇ -, 1, 2, 3-thiadiazolyl-indole-, 1,2,4-thiadiazolyl-indole-, 1,3,4-thiadiazolyl-indole-, oxazolyl - ⁇ -, 1,2, 4-oxadiazolyl-indole-, 1, 2, 3-oxadiazolyl-indole-, 1,3,4 oxadiazolyl-indole-, pyrimidinyl-indole , pyrazinyl - ⁇ -, pyridazinyl - ⁇ -, quinoxalinyl - ⁇ -, 4H- chromen-4-one-yl - ⁇ -, pyridyl - ⁇
• the present invention provides a compound of the formula la and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein R 6 is phenyl-Y-, wherein Y is absent or Selected from d- 3 alkyl, C 2 -3 alkenyl, C 2 -3 alkynyl, C 2 -3 alkenyl-(C0) _, C 2 -3 alkynyl-(C0) _, wherein phenyl is Selected as ( ⁇ 3 alkyl, halogen, nitro, d- 3 alkoxy, cyano, C 2 -3 alkenyl, C 2 -3 alkynyl, d - 3 acylamino, halo d - 3 alkyl , one or more substitutions of halo d- 3 alkoxy, amino, NH(d- 3 alkyl), fluorene (( -3 alkyl) 2 and d- 3 alkyl NHC0 or
• the present invention provides a compound of the formula la and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein R 6 is phenyl-Y-, wherein Y is absent or Selected from d- 3 alkyl, C 2 -3 alkenyl, C 2 -3 alkynyl, C 2 -3 alkenyl-(C0) _, C 2 -3 alkynyl-(C0) _, wherein phenyl is Selected as ( ⁇ 3 alkyl, halogen, nitro, d- 3 alkoxy, cyano, C 2 -3 alkenyl, C 2 -3 alkynyl, halogenated d - 3 alkyl, halogenated d - 3 One or more substitutions of alkoxy, d- 3 amide, amino and d- 3 alkyl NHC0 or phenyl together with oxazole, pyrazine or pyrrole form benzoxazo
• the present invention provides a compound of the formula la and a stereoisomer, salt, hydrate, solvate or crystal thereof, wherein R 6 is phenyl-Y-, wherein Y is absent or Selected from d- 3 alkyl, C 2 -3 alkenyl, C 2 -3 alkynyl, C 2 -3 alkenyl-(C0) _, C 2 -3 alkynyl-(C0) _, wherein phenyl is One selected from ( 3 alkyl, halogen, nitro, d- 3 alkoxy, cyano, halogenated d- 3 alkyl, halogenated d- 3 alkoxy, and d- 3 alkyl NHC0 or A plurality of substituents or phenyl groups together with an oxazole, pyrazine or pyrrole form a benzoxazolyl group, a benzo[b]pyrazinyl group, a benzo[b
• the invention provides compounds of the formula la and stereoisomers, salts, hydrates, solvates or crystals thereof, wherein R 6 is phenyl- or benzyl-(phenyl-( 3 ⁇ 4-), Preferably, the phenyl or benzyl group is in the para or meta position to the oxy group on the phenyl ring to which it is attached.
• the group may also be a furyl group, a pyrrolyl group, a tetrazole, a furazan, a oxadiazole, a pyran, a thiopyran, a piperidine, a triazine, an oxazine or the like.
• the present invention provides the following specific compounds:
• the present invention provides a process for the preparation of the compounds of the formula I and la of the invention, which process comprises
• R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are as defined in the above formula I.
• the present invention provides a pharmaceutical composition
• a pharmaceutical composition comprising a compound, a stereoisomer, a salt, a hydrate, a solvate or a crystal of the formula I and la of the present invention.
• the present invention provides a pharmaceutical composition
• a pharmaceutical composition comprising a compound, a stereoisomer, a salt, a hydrate, a solvate or a crystal of the formula I and la, further comprising one selected from the group consisting of or Multiple additional anti-HCV therapeutics: HCV NS3 protease inhibitor, HCV NS5B RNA-dependent RNA polymerase inhibitor, nucleoside analog, interferon alpha, pegylated interferon, ribavirin, levovir Lin, Veramididine, TLR7 agonist, TLR9 agonist, cyclophilin inhibitor, alpha glucosidase inhibitor, NS5A inhibitor and NS3 helicase inhibitor.
• the compound, stereoisomer, salt, hydrate, solvate or crystal of the formula I and la of the present invention may be mixed with a pharmaceutically acceptable carrier, diluent or excipient to prepare a pharmaceutical preparation, Suitable for oral or parenteral administration.
• Methods of administration include, but are not limited to, intradermal, intramuscular, intraperitoneal, intravenous, subcutaneous, intranasal, and oral routes.
• the formulation may be administered by any route, for example by infusion or bolus injection, by a route of absorption through the epithelium or skin mucosa (e.g., oral mucosa or rectum, etc.). Administration can be systemic or topical.
• oral administration preparation examples include a solid or liquid dosage form, specifically, a tablet Agents, pills, granules, powders, capsules, syrups, emulsions, suspensions, and the like.
• the formulations may be prepared by methods known in the art and comprise carriers, diluents or excipients conventionally employed in the field of pharmaceutical formulations.
• the present invention provides a compound, stereoisomer, salt, hydrate, solvate or crystal of the formula I and la of the present invention or a pharmaceutical composition of the present invention for treating a Flaviviridae virus infection And a method comprising administering to the subject a compound, a stereoisomer, a salt, a hydrate, a solvate or a crystal of the formula I and la or a compound comprising the formula I and la, a stereoisomer, A salt, hydrate, solvate or crystalline pharmaceutical composition is administered in an amount effective to reduce the viral load of the virus in the subject.
• the invention provides a method for treating and/or preventing an infection of an RNA virus, such as a Flaviviridae virus, comprising administering to a subject in need of such treatment a compound of the invention, a stereoisomer thereof, a salt, a hydrate thereof , solvate or crystal or a pharmaceutical composition thereof.
• the invention provides a method of inhibiting an RNA virus, such as a Flaviviridae virus infection, comprising combining the virus with a therapeutically effective amount of a compound of the invention, a stereoisomer thereof, a salt, a hydrate, a solvent thereof Contact with the crystallization or its pharmaceutical composition.
• Rhuviridae refers to any virus of the Flaviviridae family, including those that infect humans and non-human animals, such as flaviviruses, plague viruses, and hepatitis C virus.
• the compounds and compositions of the invention are particularly useful for the therapeutic or prophylactic treatment of HCV.
• the present invention provides a compound, stereoisomer, salt, hydrate, solvate or crystal of the formula I and la of the present invention for use in the prevention or treatment of a viral infection, particularly a flavivirus infection.
• a viral infection particularly a flavivirus infection.
• Use, and use in the preparation of a medicament for the prevention and/or treatment of a viral infection in particular for the preparation of a medicament for the prevention and/or treatment of HCV viral infections, such as HCV viral hepatitis diseases. Examples of such diseases are acute hepatitis C, chronic hepatitis C, and a mixed infection of hepatitis C and hepatitis B or hepatitis D. Definition of Terms
• stereoisomer refers to an isomer produced by the arrangement of atoms in a molecule in a spatially different manner. These include cis and trans isomers, enantiomers and conformational isomers. All stereoisomers are within the scope of the invention. Individual stereoisomers of the compounds of the invention may be substantially free of other isomers or may be admixed, for example, as a racemate, or with all other stereoisomers.
• salt refers to a pharmaceutically acceptable salt of a compound of the invention formed with an acid, which may be selected from the group consisting of: phosphoric acid, sulfuric acid, hydrochloric acid, hydrobromic acid, citric acid, maleic acid, and propylene. Acid, mandelic acid, succinic acid, fumaric acid, acetic acid, lactic acid, nitric acid, sulfonic acid, p-toluenesulfonic acid, malic acid, methanesulfonic acid or its Analogs.
• solvate refers to a form of the compound of the present invention which forms a solid or liquid complex by coordination with a solvent molecule. Hydrates are a special form of solvates in which coordination occurs with water. Within the scope of the present invention, the solvate is preferably a hydrate.
• crystalline refers to the various solid forms formed by the compounds described herein, including crystalline forms, amorphous forms.
• alkyl means a straight-chain, branched or cyclic saturated hydrocarbon group, preferably a hydrocarbon group of 6 or less carbon atoms.
• alkyl groups include methyl, ethyl, n-propyl, isopropyl, cyclopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, n-pentyl, isopentyl, neopentyl Base, cyclohexyl, n-hexyl, isohexyl, 2, 2, -methylbutyl and 2,3-dimethylbutyl.
• d-6 alkyl means a straight-chain, branched or cyclic saturated hydrocarbon group having 1 to 6 carbon atoms.
• CH alkyl means a straight-chain, branched or cyclic saturated hydrocarbon group having 1 to 4 carbon atoms.
• the alkenyl group of a carbon atom is most preferably an alkenyl group having 2 carbon atoms.
• C 2 -6 alkenyl refers to an unsaturated hydrocarbon group containing one or two carbon-carbon double bonds and having from 2 to 6 carbon atoms.
• C 2 - 4 alkenyl refers to an unsaturated hydrocarbon group containing one or two carbon-carbon double bonds and having from 2 to 4 carbon atoms.
• alkynyl refers to a straight or branched chain unsaturated hydrocarbon group containing one or more carbon-carbon triple bonds (C ⁇ C), preferably an alkynyl group having 2 to 6 carbon atoms, more preferably 2 to 4 The alkynyl group of one carbon atom is most preferably an alkynyl group having 2 carbon atoms.
• C 2 - 6 alkenyl refers to an unsaturated hydrocarbon group containing one or two carbon-carbon triple bonds and having from 2 to 6 carbon atoms.
• C 2 - 4 alkenyl refers to an unsaturated hydrocarbon group containing one or two carbon-carbon triple bonds and having from 2 to 4 carbon atoms.
• alkoxy refers to -0-alkyl
• halogen means fluoro, chloro, bromo, iodo.
• haloalkyl refers to an alkyl group substituted with at least one halogen atom.
• heterocyclic group means a cyclic group containing at least one hetero atom, wherein the hetero atom is N, 0 or S, and includes a monoheterocyclic group and a fused heterocyclic group.
• the monoheterocyclic group includes, but is not limited to, furan, thiophene, pyrrole, thiazole, imidazole, 1,2,3-triazole, 1,2,4-triazole, 1, 2,3-thiadiazole, cacao Azole, 1, 2, 4-oxadiazole, 1,3,4-oxadiazole, pyridine, pyrimidine, pyridazine, pyrazine, tetrahydrofuran, tetrahydropyrrole, piperidine, piperazine, morpholine, isoxazole Porphyrin and the like.
• the fused heterocyclic group includes, but is not limited to, quinoline, isoquinoline, anthracene, benzofuran, benzothiophene, anthracene, acridine, carbazole, anthracene, chromenone, anthrone, quinoxaline, 3, 4 - dihydronaphthalenone, dibenzofuran, hydrogenated dibenzofuran, benzoxazolyl, and the like.
• benzo-5-membered ring and “benzo-6-membered ring” refer to a fused ring group. Detailed ways
• the target compound was obtained by the same procedure as in Example 1 using -2'-deoxy-2'-fluoro-2'-methyluridine as a starting material.
• step 1 In a 100 ml single-mouth bottle, add the product obtained in step 1 (0.9 g, 4. 7 mmol), 40% HBr, fully soluble, yellow transparent, acetic acid 6 mL, heated to 115 ° C, reacted for 20 hours, the raw materials disappeared, stop The reaction was concentrated to dryness.
• step 1 In a 100 ml single-mouth bottle, add the product of step 1 (0.9 g, 4. 7 mmol), add 40% HBr, fully soluble, yellow transparent, 6 mL of acetic acid, heated to 115 ° C, and reacted for 20 hours, the raw materials basically disappeared. The reaction was quenched and concentrated to dryness.
• Example 2 4-(111-1,2,4-triazol-1-yl)phenol, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R) -2' Deoxy-2'-fluoro-2'-methyluridine was used as a starting material, and the same procedure as in Example 1 was carried out to obtain the target compound.
• the compound prepared in the first step is 2-fluoro-4-hydroxy-[1,1'-biphenyl], phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R).
• the target compound was obtained by the same procedure as in Example 1 using -2'-deoxy-2'-fluoro-2'-methyluridine as a starting material.
• Step 3 (2S) -2- ((4-(Pyridine-2-yl)phenyloxy)(((2R, 3R, 4R, 5R) -5- (2, 4-dioxo-3, Preparation of 4-dihydropyrimidin-1(2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy)phosphoryl)amino)propionic acid isopropyl ester
• the compound prepared in the second step 4-(pyrimidin-2-yl)phenol, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R) -2'-deoxy-
• the target compound was obtained by the same procedure as in Example 1 using 2'-fluoro-2'-methyluridine as a starting material.
• the compound prepared in the first step is 4-(3-fluorophenyl)phenol, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2'R)-2'-deoxy-
• the target compound was obtained by the same procedure as in Example 1 using 2'-fluoro-2'-methyluridine as a starting material.
• the compound 2-(2,3-difluoro-6-nitrophenyl)-3-oxobutanoate obtained in the step 1 was transferred to a reaction flask, and 10 mL of concentrated hydrochloric acid and 10 mL of glacial acetic acid were added.
• Step 7 (2S)-2-(((S)-((4-Fluoro-1,2-dimethyl-1H-indole-5-yl)oxy)(((2R, 3R, 4R, 5R) -5-(2,4-dioxo-3,4-dihydropyrimidin-1 (2H)-yl)-4-fluoro-3-hydroxy-4-methyltetrahydrofuran-2-yl)methoxy Phosphoryl)amino)propionic acid isopropyl ester
• the compound prepared in the step 6 2-dimethyl-4-fluoro-5-hydroxy-1H-indole, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2)
• the target compound was obtained by the same procedure as in Example 1 using 'R) -2'-deoxy-2'-fluoro-2'-methyluridine as a starting material.
• the lysine was added to a solution of 2. 7 g of m-chloroperoxybenzoic acid in a 100 mL portion of methylene chloride. After reacting at 50 ° C for 4 h, the reaction was quenched with EtOAc (3 mL).
• the compound prepared in the step 8 is 3-methyl-5-hydroxy-6-fluoro-benzo[d]isoxazole, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and 2' R) -2'-deoxy-2'-fluoro-2'-methyluridine was used as a starting material, and the same procedure as in Example 1 was carried out to obtain the target compound.
• the compound prepared in the step 4 is 5-hydroxy-6-fluorobenzo[c][l, 2,5]thiadiazole, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R) -2'-deoxy-2'-fluoro-2'-methyluridine was used as a raw material, and the target compound was obtained by the same procedure as in Example 1.
• the compound prepared in the first step is 4-hydroxy-4'-trifluoromethyl-[1,1'-biphenyl], phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and 2' R) -2'-deoxy-2'-fluoro-2'-methyluridine was used as a starting material, and the same procedure as in Example 1 was carried out to obtain the target compound.
• the compound prepared in the first step 4-(thiazol-4-yl)phenol, phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R) -2'-deoxy-2
• the target compound was obtained by the same procedure as in Example 1 using '-fluoro-2'-methyluridine as a starting material.
• the compound prepared in the first step is 4-hydroxy-4'-chloro-2'-fluoro-[1,1'-biphenyl], phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol
• the target compound was obtained by the same method as in Example 1 using (2' R) -2'-deoxy-2'-fluoro-2'-methyluridine as a starting material.
• the compound prepared in the first step is 4-hydroxy-3'-fluoro-4'-methyl-[1,-biphenyl], phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R) -2'-deoxy-2'-fluoro-2'-methyluridine was used as a raw material, and the target compound was obtained by the same procedure as in Example 1.
• the compound prepared in the first step is 4-hydroxy-4'-fluoro-3'-methyl-[1,-biphenyl], phosphorus oxychloride, L-alanine isopropyl ester hydrochloride, pentafluorophenol and (2' R) -2'-deoxy-2'-fluoro-2'-methyluridine was used as a raw material, and the target compound was obtained by the same procedure as in Example 1.
• the Huh7 lb cell line was supplied by Shanghai WuXi PharmaTech Development Co., Ltd. as a Huh7 cell line containing the HCV lb replicon with a stable luciferase (Luc) reporter. It cloned the HCV non-structural protein gene, neo (G418 resistance) and luciferase reporter gene into pBR vector by gene recombination technology. The vector carrying the HCV replicon was then transfected into huh7 cells. By G418 resistance screening, the HCV replicon was stably replicated and the related proteins and luciferase were stably expressed in huh7 cells. This cell model is used for in vitro screening of anti-HCV compounds.
• the anti-HCV activity of the compounds was determined by examining the expression level of luciferase. See Lohmann V, et al. 1999. Repl ication of subgenomic hepatitis C virus RNAs in a hepatoma cel l l ine. Science. 285 (5424): 110-113. 1. 3 Positive control:
• the reference drug used in the experimental example of the present invention is the compound of Example 25 of WO 2008/121634 (PCT/US2008/058183), namely (S) -2- ⁇ [ (2R, 3R, 4R, 5R) _5_ (2, 4 -dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyl-tetrahydro-furan-2-ylmethoxy]-phenoxy -phosphorylamino ⁇ -isopropyl propionate ((S) -2- ⁇ [ (2R, 3R, 4R, 5R) _5_ (2, 4-dioxo_3, 4-dihydro-2H-pyrimidin -1-yl) - 4-f luoro-3-hydroxy-4-methyl-tetrahydro-furan-2-ylmethoxy] -phen oxy-phosphorylamino ⁇ -propionic acid isopropyl ester) 0
• CPD Fluorescence signal value of compound pore
• CPD Fluorescence signal value of compound pore
• Example 12 0. 637 Person ',', o OV, 1 o
• Example 2 the compound of the present invention prepared in the above Example 1 was used, and 10 mM mother liquor was prepared by using DMS0, and then diluted to 500 nM in DMEM complete medium containing 0.5% DMS0, and then diluted 4 times in total, 6 in total. Concentration; positive control drug containing 0. 5% DMS0 DMEM complete medium was diluted to 10 ⁇ M, and then diluted 4 times in sequence, a total of 6 concentrations.
• the J399EM (HCV genotype 2a) virus a full-length HCV mutant transfected with EGFP (enhanced green fluorescent protein), has the same infectivity as the JFH-1 wild type, and can be inserted into the NS5A region by inserting the EGFP coding sequence.
• the fluorescence of NS5A-EGFP fusion protein was observed directly in infected cells, and was provided by Shanghai Institute of Materia Medica, Chinese Academy of Sciences.
• DMEM medium (DMEM medium), purchased from Invitrogen, USA;
• Fetal bovine serum purchased from Sigma, USA;
• L-Glutamine (L (+) - Glutamine), purchased from Invitrogen, USA;
• Penicillin-streptomycin purchased from Invitrogen, USA;
• PBS Phosphate buffered saline
• Trypsin purchased from Invitrogen, USA;
• DMS0 Dimethyl sulfoxide
• EnVision multi-function microplate reader purchased from Perk in-Elmer, USA.
• Huh 7.5.1 Cell preparation Huh 7.5.1 cells in log phase were collected, resuspended in DMEM complete medium, seeded in 96-well plates (7 ⁇ 10 3 cells/well), placed at 37 ° C, Cultured in a 5% CO 2 incubator for 24 h ;
• Viral infection After resuspending J399EM virus in DMEM complete medium, add virus supernatant (M0I « 0.1) to the above 96-well plate. After 8 hours of infection, wash with PBS;
• Anti-HCV virus activity assay After the culture is completed, the relative fluorescence intensity (RFU) of each well is read by EnVision multi-function microplate reader. The data obtained are used to calculate the anti-HCV activity of the compound.
• the calculation formula is:
• Inhibit ion% (RFU ZPE - RFU CPD ) / (RFU ZPE - RFU HPE ) X 100 where RFU ZPE represents the relative fluorescence intensity of the ineffective control group, RFUTM represents the relative fluorescence intensity of the corresponding compound, and RFU HPE represents 100% The relative fluorescence intensity of the control group was effectively affected.
• Viability% 0D CPD / 0D ZPE X 100
• 0D ZPE represents the optical density value of the ineffective control group
• 0D ePD represents the optical density value of the corresponding compound
• Example 1 of the present invention has excellent antiviral activity and less cytotoxicity as compared with the positive control drug for the HCV in vitro cell infection model.
• Example 1 the compound of the present invention prepared in the above Example 1 was used, and the positive control drug was the same as above, and each compound was added to 0.5% sodium carboxymethylcellulose (CMC), and vortexed to prepare a 10 mg/ml mixture. Suspension for intragastric administration.
• CMC sodium carboxymethylcellulose
• GS-461203 standard a metabolite for testing drugs, chemical name (2' R) ⁇ 2'-deoxy-2'-fluoro-2'-methyluridine triphosphate, purchased from TriLink BioTechnologies, USA
• Acetonitrile (chromatographically pure): purchased from Spectrum Corporation of the United States.
• API 5500 LC/MS purchased from AB, USA.
• liver homogenate sample or standard curve sample was added to 150 ⁇ l of acetonitrile containing internal standard (100 ng/ml), vortexed for 2 min and centrifuged for 10 min (6000 rpm). Transfer the supernatant to the injection vial;
• the peak concentration of the metabolite of the compound of Example 1 of the present invention in the liver tissue and the area under the drug-time curve were superior to the positive control drug, and had a good in vivo exposure.
• the compound of the present invention has an efficient ability to inhibit HCV virus, EC 5 compared with the positive control drug. It has comparable or superior effects and is less toxic to host cells, CC 5 . Higher, safer, has a good prospect for the treatment of HCV infection.

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