New Antibacterial Agents Derived from the DNA Gyrase Inhibitor Cyclothialidine
摘要:
Cyclothialidine (1, Ro 09-1437) is a potent DNA gyrase inhibitor that was isolated from Streptomyces filipinensis NR0484 and is a member of a new family of natural products. It acts by competitively inhibiting the ATPase activity exerted by the B subunit of DNA gyrase but barely exhibits any growth inhibitory activity against intact bacterial cells, presumably due to insufficient permeation of the cytoplasmic membrane. To explore the antibacterial potential of 1, we developed a flexible synthetic route allowing for the systematic modification of its structure. From a first set of analogues, structure-activity relationships (SAR) were established for different substitution patterns, and the 14-hydroxylated, bicyclic core (X) of 1 seemed to be the structural prerequisite for DNA gyrase inhibitory activity. The variation of the lactone ring size, however, revealed that activity can be found among 11- to 16-membered lactones, and even seco-analogues were shown to maintain some enzyme inhibitory properties, thereby reducing the minimal structural requirements to a rather simple, hydroxylated benzyl sulfide (XI). On the basis of these "minimal structures" a modification program afforded a number of inhibitors that showed in vitro activity against Gram-positive bacteria. The best activities were displayed by 14-membered lactones, and representatives of this subclass exhibit excellent and broad in vitro antibacterial activity against Gram-positive pathogens, including Staphylococcus aureus, Streptococcus pyogenes, and Enterococcus faecalis, and overcome resistance against clinically used drugs. By improving the pharmacokinetic properties of the most active compounds (94, 97), in particular by lowering their lipophilic properties, we were able to identify congeners of cyclothialidine (1) that showed efficacy in vivo.
[EN] HIV PROTEASE INHIBITORS, COMPOSITIONS CONTAINING THE SAME AND THEIR PHARMACEUTICAL USES [FR] INHIBITEURS DE LA PROTEASE DU VIH, COMPOSITIONS LES CONTENANT ET LEURS UTILISATIONS PHARMACEUTIQUES
Structure–activity relationship of HIV-1 protease inhibitors containing AHPBA. Part III: modification of P2 site
作者:E Takashiro
DOI:10.1016/s0968-0896(98)00004-2
日期:1998.5
The structure-activity relationship of HIV-1 protease (HIV-1 PR) inhibitors containing AHPBA (3-amino-2-hydroxy-4-phenylbutanoic acid) is discussed. In order to solve the problem of poor oral bioavailability, small-sized dipeptide HIV-1 protease inhibitors containing cyclic urethanes or benzamides at the P2 site were designed and prepared. The substitution patterns of the benzamides contributed significantly
The structure-activityrelationship of HIV-1 protease (HIV-1 PR) inhibitorscontaining alpha-hydroxy-beta-amino acids is discussed. We demonstrated that substituent groups on the P1 aromatic rings of the inhibitors exert significant influence on their biological activity. Inhibitors bearing an alkyl or a fluorine atom at the meta and para position on their P1 benzene ring were found to be good inhibitors
A method of making HIV protease inhibitors of general formula (
1
):
1
These HIV compounds inhibit or block the biological activity of the HIV protease enzyme, causing the replication of the HIV virus to terminate. These compounds, as well as pharmaceutical compositions that contain these compounds and optically other antiviral agents as active ingredients, are suitable for treating patients or hosts infected with the HIV virus, which is known to cause AIDS.
[EN] HIV PROTEASE INHIBITORS<br/>[FR] INHIBITEURS DE LA PROTEASE DU VIH
申请人:AGOURON PHARMACEUTICALS, INC.
公开号:WO1995009843A1
公开(公告)日:1995-04-13
(EN) HIV protease inhibitors, obtainable by chemical synthesis, inhibit or block the biological activity of the HIV protease enzyme, causing the replication of the HIV virus to terminate. These compounds, as well as pharmaceutical compositions that contain these compounds and optionally other anti-viral agents as active ingredients, are suitable for treating patients or hosts infected with the HIV virus, which is known to cause AIDS.(FR) L'invention concerne des inhibiteurs de la protéase du VIH obtenus par synthèse chimique qui inhibent ou bloquent l'activité biologique de la protéase du VIH et stoppent la réplication du virus du VIH. Ces composés, ainsi que les compositions pharmaceutiques contenant ces derniers et éventuellement d'autres agents antiviraux en tant que principes actifs, conviennent au traitement de patients ou d'hôtes infectés par le virus du VIH connu en tant qu'inducteur du SIDA.
[EN] INTERMEDIATE AND PROCESS FOR MAKING<br/>[FR] INTERMEDIAIRE ET SON PROCEDE DE FABRICATION
申请人:ELI LILLY AND COMPANY
公开号:WO1995021164A1
公开(公告)日:1995-08-10
(EN) The present invention provides novel HIV protease inhibitors, pharmaceutical formulations containing those compounds and methods of treating and/or preventing HIV infection and/or AIDS.(FR) La présente invention se rapporte à de nouveaux inhibiteurs de la protéase du VIH, à des formulations pharmaceutiques contenant ces composés et à des procédés conçus pour traiter et/ou prévenir les infections dûes au VIH et/ou le SIDA.