- Redesigning of the cap conformation and symmetry of the diphenylethyne core to yield highly potent pan-genotypic NS5A inhibitors with high potency and high resistance barrier
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Herein, we report the discovery of several NS5A inhibitors with potency against HCV genotype 1b in the picomolar range. Compounds (15, 33) were of extremely high potency against HCV genotype 1b (EC50 ≈ 1 pM), improved activity against genotype 3a (GT 3a) and good metabolic stability. We studied the impact of changing the cap conformation relative to the diphenylethyne core and/or compound symmetry on both potency and metabolic stability. The analogs obtained exhibited improved potency against HCV genotypes 1a, 1b, 3a and 4a compared to the clinically approved candidate daclatasvir with EC50 values in the low picomolar range and SI50s > 7 orders of magnitude. Compound 15, a symmetrically m-, m’-substituted diphenyl ethyne analog, was 150-fold more potent than daclatasvir against GT 3a, while compound 33, an asymmetrically m-, p-substituted diphenyl ethyne analog, was 35-fold more potent than daclatasvir against GT 3a. In addition, compound 15 exhibited a higher resistance barrier than daclatasvir against genotype 1b.
- Abdallah, Mennatallah,Hamed, Mostafa M.,Frakolaki, Efseveia,Katsamakas, Sotirios,Vassilaki, Niki,Bartenschlager, Ralf,Zoidis, Grigoris,Hirsch, Anna K.H.,Abdel-Halim, Mohammad,Abadi, Ashraf H.
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- Design and synthesis of novel symmetric fluorene-2,7-diamine derivatives as potent hepatitis C virus inhibitors
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Hepatitis C virus (HCV) is an international challenge. Since the discovery of NS5A direct-acting antivirals, researchers turned their attention to pursue novel NS5A inhibitors with optimized design and structure. Herein we explore highly potent hepatitis C virus (HCV) NS5A inhibitors; the novel analogs share a common symmetrical prolinamide 2,7-diaminofluorene scaffold. Modification of the 2,7-diaminofluorene backbone included the use of (S)-prolinamide or its isostere (S,R)-piperidine-3-caboxamide, both bearing different amino acid residues with terminal carbamate groups. Compound 26 exhibited potent inhibitory activity against HCV genotype (GT) 1b (effective concentration (EC50) = 36 pM and a selectivity index of >2.78 × 106). Compound 26 showed high selectivity on GT 1b versus GT 4a. Interestingly, it showed a significant antiviral effect against GT 3a (EC50 = 1.2 nM). The structure-activity relationship (SAR) analysis revealed that picomolar inhibitory activity was attained with the use of S-prolinamide capped with R- isoleucine or R-phenylglycine residues bearing a terminal alkyl carbamate group.
- Mousa, Mai H. A.,Ahmed, Nermin S.,Schwedtmann, Kai,Frakolaki, Efseveia,Vassilaki, Niki,Zoidis, Grigoris,Weigand, Jan J.,Abadi, Ashraf H.
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- Symmetric benzidine derivatives as anti-HCV agents: Insight into the nature, stereochemistry of the capping amino acid and the size of the terminal capping carbamates
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Novel symmetric molecules, bearing a benzidine prolinamide core, two terminal carbamate caps of variable sizes and nature, including natural and unnatural amino acids were developed. Several terminal N-carbamate substituents of the core structure, ranging from linear methyl, ethyl and butyl groups to branching isobutyl group; and an aromatic substituent were also synthesized. Series 1 has hydrophobic AA residues, namely S and R phenylglycine and a terminal carbamate capping group, whereas Series 2 bears sulphur containing amino acids, specifically S and R methionine and the natural R methylcysteine. The novel compounds were tested for their inhibitory activity (EC50) and their cytotoxicity (CC50), using an HCV 1b (Con1) reporter replicon cell line. Compound 4 with the unnatural capping residue, bearing D-Phenylglycine amino acid residue and N-isobutyloxycarbonyl capping group, was the most active within the two series, with EC50 = 0.0067 nM. Moreover, it showed high SI50 > 14788524 and was not cytotoxic at the highest tested concentration (100 μΜ), indicating its safety profile. Compound 4 also inhibited HCV genotypes 2a, 3a and 4a. Compared to the clinically approved NS5A inhibitor Daclatasvir, compound 4 shows higher activity against genotypes 1b and 3a, as well as improved safety profile.
- Abadi, Ashraf H.,Abdel Karim, Shereen E.,Abdel-Halim, Mohammad,Ahmed, Nermin S.,Frakolaki, Efseveia,Vassilaki, Niki,Youssef, Youssef H.,Zoidis, Grigoris
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- A novel, potent, and orally bioavailable thiazole HCV NS5A inhibitor for the treatment of hepatitis C virus
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A medicinal chemistry program based on the small-molecule HCV NS5A inhibitor daclatasvir has led to the discovery of dimeric phenylthiazole compound 8, a novel and potent HCV NS5A inhibitor. The subsequent SAR studies and optimization revealed that the cycloalkyl amide derivatives 27a-29a exhibited superior potency against GT1b with GT1b EC50 values at picomolar concentration. Interestingly, high diastereospecificity for HCV inhibition was observed in this class with the (1R,2S,1′R,2′S) diastereomer displaying the highest GT1b inhibitory activity. The best inhibitor 27a was found to be 3-fold more potent (GT1b EC50 = 0.003 nM) than daclatasvir (GT1b EC50 = 0.009 nM) against GT1b, and no detectable in vitro cytotoxicity was observed (CC50 > 50 μM). Pharmacokinetic studies demonstrated that compound 27a had an excellent pharmacokinetic profiles with a superior oral exposure and desired bioavailability after oral administration in both rats and dogs, and therefore it was selected as a developmental candidate for the treatment of HCV infection.
- Yeh, Teng-Kuang,Kang, Iou-Jiun,Hsu, Tsu-An,Lee, Yen-Chun,Lee, Chung-Chi,Hsu, Sheng-Ju,Tian, Ya-Wen,Yang, Hui-Yun,Chen, Chiung-Tong,Chao, Yu-Sheng,Yueh, Andrew,Chern, Jyh-Haur
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p. 245 - 268
(2019/02/19)
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- Hepatitis c polymerase inhibitors
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The invention relates to a 4,4'-bis(2-((S)-pyrrolidine-2-yl)-1H-imidazole-4-yl)biphenyl type compound and a derivative therefore. The compound disclosed by the invention is a hepatitis c virus (HCV) polymerase inhibitor, has HCV resistant activity and can
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- Diphenyl sulfate derivatives or pharmaceutically acceptable salts thereof, preparation method thereof and pharmaceutical composition for use in preventing or treating hepatitis C virus related diseases
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The present invention relates to a diphenyl sulfate derivative or a pharmaceutically acceptable salt thereof, a production method thereof, and a pharmaceutical composition for preventing or treating hepatitis C virus-associated diseases containing the same as an active ingredient. According to the present invention, the diphenyl sulfate derivative excellently inhibits infection by hepatitis C virus and replication of hepatitis C virus, and thus can be useful as pharmaceutical compositions for preventing or treating liver diseases such as hepatocellular cancer, cirrhosis, chronic hepatitis C, and acute hepatitis C caused by hepatitis C virus.COPYRIGHT KIPO 2017
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Paragraph 0173-0175
(2017/05/23)
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- SPIRO COMPOUNDS AS HEPATITIS C VIRUS INHIBITORS
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Disclosed are spiro compounds of formula (I), or stereomers, geometric isomers, tautomers, nitrogen oxides, hydrates, solvates, metabolites, pharmaceutically acceptable salts or prodrugs thereof. The compounds can be used to treat hepatitis C virus (HCV) infection or hepatitis C disease. Furthermore disclosed are pharmaceutical compositions containing the compounds and the method of using the compounds or pharmaceutical compositions in the treatment of HCV infection or hepatitis C disease.
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Paragraph 0428
(2015/11/09)
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- POTENT AND SELECTIVE INHIBITORS OF HEPATITIS C VIRUS
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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 othe
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Page/Page column 35; 36
(2015/11/09)
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- HEPATITIS C VIRUS INHIBITORS
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The present disclosure relates to compounds, compositions and methods for the treatment of hepatitis C virus (HCV) infection. Also disclosed are pharmaceutical compositions containing such compounds and methods for using these compounds in the treatment of HCV infection.
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Page/Page column 84
(2012/02/15)
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- HEPATITIS C INHIBITOR COMPOUNDS
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Compounds of Formula (I): wherein R1, R2, RA, RB, Z1, Z2, Z3, Z4, Z5 and Z6 are defined herein. The compounds are useful as inhibitors of the function of NS5A protein encoded by HCV for the treatment of hepatitis C viral infection.
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Page/Page column 25
(2011/08/21)
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- Anti-Viral Compounds
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Compounds effective in inhibiting replication of Hepatitis C virus (“HCV”) are described. This invention also relates to processes of making such compounds, compositions comprising such compounds, and methods of using such compounds to treat HCV infection.
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- HEPATITIS C VIRUS INHIBITORS
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This disclosure concerns novel compounds of Formula (I) as defined in the specification and compositions comprising such novel compounds. These compounds are useful antiviral agents, especially in inhibiting the function of the NS5A protein encoded by Hepatitis C virus (HCV). Thus, the disclosure also concerns a method of treating HCV related diseases or conditions by use of these novel compounds or a composition comprising such novel compounds.
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Page/Page column 132
(2010/12/26)
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- Hepatitis C Virus Inhibitors
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This disclosure concerns novel compounds of Formula (I) as defined in the specification and compositions comprising such novel compounds. These compounds are useful antiviral agents, especially in inhibiting the function of the NS5A protein encoded by Hepatitis C virus (HCV). Thus, the disclosure also concerns a method of treating HCV related diseases or conditions by use of these novel compounds or a composition comprising such novel compounds.
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Page/Page column 50
(2010/10/19)
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- HEPATITIS C VIRUS INHIBITORS
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This disclosure concerns novel compounds of Formula (I) as defined in the specification and compositions comprising such novel compounds. These compounds are useful antiviral agents, especially in inhibiting the function of the NS5A protein encoded by Hepatitis C virus (HCV). Thus, the disclosure also concerns a method of treating HCV related diseases or conditions by use of these novel compounds or a composition comprising such novel compounds.
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Page/Page column 207
(2010/11/03)
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- HEPATITIS C VIRUS INHIBITORS
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The present disclosure relates to compounds of the following formula (I) or a pharmaceutically acceptable salt thereof, wherein A and B are each phenyl; D and E are each five-membered aromatic rings containing one, two, or three i hcteroatoms independently selected from nitrogen, oxygen, and sulfur; provided that ', at least one of D and E is other than imidazole; compositions and methods for the treatment of Hepatitis C virus (HCV) inf ection. Also disclosed are pharmaceutical compositions containing such compounds and methods f or using these compounds in the treatment of HCV inf ection.
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Page/Page column 93
(2009/01/20)
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- Lysine sulfonamides as novel HIV-protease inhibitors: Nε-Acyl aromatic α-amino acids
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A series of lysine sulfonamide analogues bearing Nε-acyl aromatic amino acids were synthesized using an efficient synthetic route. Evaluation of these novel protease inhibitors revealed compounds with high potency against wild-type and multiple-protease inhibitor-resistant HIV viruses.
- Stranix, Brent R.,Lavallee, Jean-Francois,Sevigny, Guy,Yelle, Jocelyn,Perron, Valerie,LeBerre, Nicholas,Herbart, Dominik,Wu, Jinzi J.
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p. 3459 - 3462
(2007/10/03)
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- Asymmetric synthesis of (S)-1-aminoindan-1,5-dicarboxylic acid and related analogues via intramolecular acylation of enantiopure α,α-disubstituted amino acids
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α,α-disubstituted amino acid derivatives are synthesized either by a self-regeneration of stereocenter strategy or using the asymmetric Strecker reaction/alkylation method. Of the four types of substrates tested for intramolecular acylation, those with a
- Ma, Dawei,Ding, Ke,Tian, Hongqi,Wang, Baomin,Cheng, Dongliang
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p. 961 - 970
(2007/10/03)
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- Synthesis of both enantiomers of phenylglycine using (-)-sparteine
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The enantioselective synthesis of both enantiomers of the N-Moc phenylglycine derivatives is reported. The synthetic strategy shows the influence of N-protecting groups in the enantioselective deprotonation and carboxylation of N,N-protected benzylamine 1 using s-BuLi·(-)-sparteine complex 4 as chirality source.
- Barberis, Claude,Voyer, Normand
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p. 1106 - 1108
(2007/10/03)
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