Human Immunodeficiency Virus (HIV) damages the immune system and leads to the life-threatening acquired immunodeficiency syndrome (AIDS). Despite the advances in the field of antiretroviral treatment, HIV remains a major public health challenge.Nucleosides represent a prominent chemotherapeutic class for treating viruses, however their cellular uptake, kinase-mediated activation and catabolism are limiting factors. Herein, we report the synthesis and in vitro evaluation of stavudine (d4T) ProTides containing polyfluorinated aryl groups against two strains; HIV-1 (IIIB) and HIV-2 (ROD). ProTide 5d containing a meta-substituted pentafluorosulfanyl (3-SF5) aryl group showed superior antiviral activity over the parent d4T and the nonfluorinated analogue 5a. ProTide 5d has low nano-molar antiviral activity; (IC50=30 nM, HIV-1) and (IC50=36 nM, HIV-2) which is over tenfold more potent than d4T. Interestingly, ProTide 5d showed a significantly high selectivity indices with SI=1753 (HIV-1) and 1461 (HIV-2) which is more than twice that of the d4T. All ProTides were screened in wild type as well as thymidine kinase deficient (TK-) cells. Enzymatic activation of ProTide 5d using carboxypeptidase Y enzyme and monitored using both P-31 and F-19 NMR is presented.
Phosphoramidate Prodrugs of 2′-<i>C</i>-Methylcytidine for Therapy of Hepatitis C Virus Infection
作者:Cristina Gardelli、Barbara Attenni、Monica Donghi、Malte Meppen、Barbara Pacini、Steven Harper、Annalise Di Marco、Fabrizio Fiore、Claudio Giuliano、Vincenzo Pucci、Ralph Laufer、Nadia Gennari、Isabella Marcucci、Joseph F. Leone、David B. Olsen、Malcolm MacCoss、Michael Rowley、Frank Narjes
DOI:10.1021/jm900447q
日期:2009.9.10
The application of a phosphoramidate prodrug approach to 2'-C-methylcytidine (NM107), the first nucleoside inhibitor of the hepatitis C virus (HCV) NS5B polymerase, is reported. 2'-C-Methylcytidine, as its valyl ester prodrug (NM283), was efficacious in reducing the viral load in patients infected with HCV. Several of the phosphoramidates prepared demonstrated a 10- to 200-fold superior potency with respect to the parent nucleoside in the cell-based replicon assay. This is due to higher levels of 2'-C-methylcytidine triphosphate in the cells. These prodrugs are efficiently activated and converted to the triphosphate in hepatocytes of several species. Our SAR studies ultimately led to compounds that gave high levels of NTP in hamster and rat liver after subcutaneous dosing and that were devoid of the toxic phenol moiety usually found in ProTides.
Design and Synthesis of Lipophilic Phosphoramidate d4T-MP Prodrugs Expressing High Potency Against HIV in Cell Culture: Structural Determinants for in Vitro Activity and QSAR
作者:Adam Q. Siddiqui、Christopher McGuigan、Carlo Ballatore、Fabio Zuccotto、Ian H. Gilbert、Erik De Clercq、Jan Balzarini
DOI:10.1021/jm9807104
日期:1999.10.1
A series of new substituted-aryl phosphoramidate derivatives of the anti-HIV drug d4T were synthesized as membrane-soluble nucleotide prodrugs, to extend and quantify the SAR observed for an earlier series of related derivatives, All of the compounds were found to be significantly more potent against HIV in cell culture than the nucleoside analogue d4T, and most were also found to be significantly more potent than the parent phosphoramidate. A Hansch type QSAR analysis was applied to-the combined series of 21 compounds. The results of this analysis revealed anti-HIV activity to be principally dependent on lipophilicity in a quadratic manner, with terms representing substituent steric bulk and electronic effects having a minimal significance.
US7951787B2
申请人:——
公开号:US7951787B2
公开(公告)日:2011-05-31
USRE47589E1
申请人:——
公开号:USRE47589E1
公开(公告)日:2019-09-03
Application of Phosphoramidate ProTide Technology Significantly Improves Antiviral Potency of Carbocyclic Adenosine Derivatives
作者:Christopher McGuigan、Alshaimaa Hassan-Abdallah、Sheila Srinivasan、Yikang Wang、Adam Siddiqui、Susan M. Daluge、Kristjan S. Gudmundsson、Huiqiang Zhou、Ed W. McLean、Jennifer P. Peckham、Thimysta C. Burnette、Harry Marr、Richard Hazen、Lynn D. Condreay、Lance Johnson、Jan Balzarini
DOI:10.1021/jm060776w
日期:2006.11.30
phosphoramidate pronucleotide (ProTide) technology to the antiviral agent carbocyclic L-d4A (L-Cd4A). The phenyl methyl alaninyl parent ProTide of L-Cd4A was prepared by Grignard-mediated phosphorochloridate reaction and resulted in a compound with significantly improved anti-HIV (2600-fold) and HBV activity. We describe modifications of the aryl, ester, and amino acid regions of the ProTide and how these changes