Novel Non-Nucleoside Human Cytomegalovirus Inhibitors Based Upon Tsao Nucleoside Derivatives: Structure-Activity Relationships
摘要:
TSAO derivatives area unique group of potent and highly specific inhibitors of HIV-1 replication. We have recently reported 4"-ureido TSAO derivatives that are devoid of anti-HIV-1 activity, but inhibit human cytomegalovirus with an activity comparable to that of Ganciclovir. We herein report the synthesis and biological evaluation of novel 4"-ureido TSAO derivatives in order to evaluate the structural features required for anti-HCMV activity. Interestingly, these studies revealed that the compounds may inhibit HCMV at the DNA polymease step via a non-nucleaside mechanism.
Novel Non-Nucleoside Human Cytomegalovirus Inhibitors Based Upon Tsao Nucleoside Derivatives: Structure-Activity Relationships
作者:Sonia de Castro、Graziela Andrei、Robert Snoeck、Jan Balzarini、María-José Camarasa、Sonsoles Velázquez
DOI:10.1080/15257770701490431
日期:2007.11.26
TSAO derivatives area unique group of potent and highly specific inhibitors of HIV-1 replication. We have recently reported 4"-ureido TSAO derivatives that are devoid of anti-HIV-1 activity, but inhibit human cytomegalovirus with an activity comparable to that of Ganciclovir. We herein report the synthesis and biological evaluation of novel 4"-ureido TSAO derivatives in order to evaluate the structural features required for anti-HCMV activity. Interestingly, these studies revealed that the compounds may inhibit HCMV at the DNA polymease step via a non-nucleaside mechanism.
4′′-Benzoylureido-TSAO Derivatives as Potent and Selective Non-Nucleoside HCMV Inhibitors. Structure−Activity Relationship and Mechanism of Antiviral Action
Analogues of the 4"-benzoyl-ureido-TSAO derivative (1) modified at different positions have been prepared and evaluated against wild-type strains of HCMV and murine cytomegalovirus (MCMV) in cell culture. In addition, the activity of the most active derivatives against several drug-resistant HCMV mutants has been determined. A stringent structure-antiviral activity relationship was observed for the 4"-benzoylureido-TSAO derivatives for which the concomitant presence of a highly lipophilic substituent at both 2'- and 5'-positions was required to fully preserve the antihuman cytomegalovirus efficacy. Time-of-addition studies and HCMV immediately early and early gene expression studies revealed a target at the time of viral DNA synthesis, although direct inhibition of HCMV-encoded DNA polymerase could not be observed in cell-free assays. Lack of cross-resistance against a broad variety of mutant HCMV strains points to an antiviral target that is different from those drugs that are currently approved for clinical use.
Unprecedented Lability of the 5‘-<i>O</i>-<i>tert</i>-Butyldimethylsilyl Group from 3‘-Spiro-5‘ ‘-(4‘ ‘-acylamino-1‘ ‘,2‘ ‘-oxathiole-2‘ ‘,2‘ ‘-dioxide) Nucleoside Derivatives via Neighboring Group Participation of the 4‘ ‘-Acylamino Residue
作者:Sonia de Castro、Angel Lozano、María-Luisa Jimeno、María-Jesús Pérez-Pérez、Ana San-Félix、María-José Camarasa、Sonsoles Velázquez
DOI:10.1021/jo0520588
日期:2006.2.1
detail, the discovery of the unusual lability of the 5‘-TBDMS group on 4‘ ‘-acylamino TSAO derivatives in DMSO solution. The synthesis and comparative chemical stability studies in different solvents of a variety of 4‘ ‘-substituted TSAO derivatives bearing different carbonyl functionalities are reported. Modifications have also been performed at the 5‘-position of the TSAO molecule to gain insight into