Application of Phosphoramidate Pronucleotide Technology to Abacavir Leads to a Significant Enhancement of Antiviral Potency
摘要:
We report the first application of pronucleotide (ProTide) technology to the antiviral agent abacavir (Ziagen), used for the treatment of HIV infection. The phenylmethoxyalaninyl phosphoramidate of abacavir was prepared in good yield in one step. Also prepared was the corresponding phosphoramidate of the guanine nucleoside analogue "carbovir". The antiviral profile of each of the parent nucleosides was compared to that of the phosphoramidate ProTides. A significant (28- to 60-fold) increase in anti-HIV potency was noted for the ProTide of abacavir but not for that of carbovir. These findings were in agreement with the markedly higher (ca. 37-fold) levels of carbovir triphosphate that are formed in CEM cells upon response to the abacavir ProTide compared with the parent abacavir compound. In contrast the anti-HBV potency of both abacavir and carbovir were improved (10- and 20-fold, respectively) by ProTide formation. As in CEM cells, the abacavir ProTide provided significantly enhanced carbovir triphosphate levels in HepG2 2.2.15 cells over that of the parent nucleoside. On the basis of these data, a series of phosphoramidate analogues with structural variation in the ester and amino acid regions were prepared and their antiviral profiles described. In addition, the pharmacokinetic disposition of the abacavir phenylethoxyalaninyl phosphoramidate was evaluated in Cynomolgus monkeys.
Aryl phosphate derivatives of d4T having anti-HIV activity
申请人:Parker Hughes Institute
公开号:US06350736B1
公开(公告)日:2002-02-26
Aryl phosphate derivatives of d4T with para-bromo substitution on the aryl group show markedly increased potency as anti-HIV agents without undesirable levels of cytotoxic activity. In particular, these derivatives are potent inhibitors of HIV reverse transcriptase. In a preferred aspect of the present invention, the phosphorus of the aryl phosphate group is further substituted with an amino acid residue that may be esterified or substituted, such as a methoxy alaninyl group.
Aryl Phosphoramidates of 5-Phospho Erythronohydroxamic Acid, A New Class of Potent Trypanocidal Compounds
作者:Gian Filippo Ruda、Pui Ee Wong、Vincent P. Alibu、Suzanne Norval、Kevin D. Read、Michael P. Barrett、Ian H. Gilbert
DOI:10.1021/jm1004754
日期:2010.8.26
survival and make it an attractive drug target for the development of new treatments against human African trypanosomiasis. 2,3-O-Isopropylidene-4-erythrono hydroxamate is a potent inhibitor of parasite Trypanosoma brucei 6-phosphogluconate dehydrogenase (6-PGDH), the third enzyme of the pentose phosphate pathway. However, this compound does not have trypanocidal activity due to its poor membrane permeability
2'-Fluoro-6'-Methylene Carbocyclic Nucleosides and Methods of Treating Viral Infections
申请人:Chu Chung K.
公开号:US20110244027A1
公开(公告)日:2011-10-06
The present invention relates to 2′-Fluoro-6′-methylene carbocyclic nucleosides, pharmaceutical compositions containing these nucleosides and their use in the treatment or prophylaxis of a number of viral infections and secondary disease states and conditions thereof, especially including Hepatitis B virus (HBV) and secondary disease states and conditions thereof (cirrhosis and liver cancer), Heptatitis C virus (HCV), Herpes Simplex virus I and II (HSV-1 and HSV-2), cytomegalovirus (CMV), Varicella-Zoster Virus (VZV) and Epstein Barr virus (EBV) and secondary cancers which occur thereof (lymphoma, nasopharyngeal cancer, including drug resistant (especially including lamivudine and/or adefovir resistant) and other mutant forms of these viruses.
[EN] STEREOSELECTIVE PROCESS OF MANUFACTURE OF PURINE PHOSPHORAMIDATES<br/>[FR] PROCÉDÉ STÉRÉOSÉLECTIF DE FABRICATION DE PHOSPHORAMIDATES DE PURINE
申请人:ATEA PHARMACEUTICALS INC
公开号:WO2021216722A1
公开(公告)日:2021-10-28
The present invention provides stereoselective processes of manufacture for the phosphoramidate nucleotide Compound 1 or a pharmaceutically acceptable salt thereof.