Ethionamide Boosters. 2. Combining Bioisosteric Replacement and Structure-Based Drug Design To Solve Pharmacokinetic Issues in a Series of Potent 1,2,4-Oxadiazole EthR Inhibitors
摘要:
Mycobacterial transcriptional repressor EthR controls the expression of EthA, the bacterial monooxygenase activating ethionamide, and is thus largely responsible for the low sensitivity of the human pathogen Mycobacterium tuberculosis to this antibiotic. We recently reported structure-activity relationships of a series of 1,2,4-oxadiazole EthR inhibitors leading to the discovery of potent ethionamide boosters. Despite high metabolic stability, pharmacokinetic evaluation revealed poor mice exposure; therefore, a second phase of optimization was required. Herein a structure-property relationship study is reported according to the replacement of the two aromatic heterocycles: 2-thienyl and 1,2,4-oxadiazolyl moieties. This work was done using a combination of structure-based drug design and in vitro/ex vivo evaluations of ethionamide boosters on the targeted protein EthR and on the human pathogen Mycobacterium tuberculosis. Thanks to this process, we identified compound 42 (BDM41906), which displays improved efficacy in addition to high exposure to mice after oral administration.
Nitrogen containing heterocyclic compounds and medicines containing the same
申请人:——
公开号:US20040167224A1
公开(公告)日:2004-08-26
Compounds represented by the following general formula:
1
(wherein X
1
, X
2
, X
3
and X
4
each independently represent a single bond, C
1-6
alkylene, etc.; A
2
represents optionally substituted phenyl, etc.; A
1
represents an optionally substituted 5- to 7-membered heterocyclic group containing —C(═Q
1
)— (wherein Q
1
represents oxygen, sulfur or ═N—R
11
(wherein R
11
represents hydrogen or C
1-6
alkyl)) and nitrogen, etc.; and Z
1
represents piperidin-diyl, etc.), salts thereof and hydrates of the foregoing.
The present invention relates to compounds of Formula (I)
wherein R1 is chosen among the following radicals:
and n=1 or 2 and m=1 or 2 with the proviso that m=2 when R1 is
The present invention also relates to the use thereof as drugs, more particularly in the treatment of mycobacterial infections and more particularly in the treatment of tuberculosis.
The present invention relates to compounds of Formula (I), wherein R1 is chosen among the following radicals: (II); (III); (IV), (V), (VI) (VII) and n=1 or 2 and m=1 or 2 with the proviso that m=2 when R1 is (VIII). The present invention also relates to the use thereof as drugs, more particularly in the treatment of mycobacterial infections and more particularly in the treatment of tuberculosis.
NITROGENOUS HETEROCYCLIC COMPOUND AND MEDICINE THEREOF
申请人:Eisai Co., Ltd.
公开号:EP1484327A1
公开(公告)日:2004-12-08
Compounds represented by the following general formula:
[wherein X1, X2, X3 and X4 each independently represent a single bond, C1-6 alkylene, etc.; A2 represents optionally substituted phenyl, etc.; A1 represents an optionally substituted 5- to 7-membered heterocyclic group containing -C(=Q1)- (wherein Q1 represents oxygen, sulfur or =N-R11 (wherein R11 represents hydrogen or C1-6 alkyl)) and nitrogen, etc.; and Z1 represents piperidin-diyl, etc.],
salts thereof and hydrates of the foregoing.
[EN] 1, 2, 4 - OXADIAZOLE DERIVATIVES AS ETHR INHIBITORS FOR USE IN THE TREATMENT TUBERCULOSIS<br/>[FR] COMPOSÉS PRÉSENTANT UNE ACTIVITÉ D'INHIBITION D'ETHR, UTILISATION DESDITS COMPOSÉS EN TANT QUE MÉDICAMENTS, COMPOSITION PHARMACEUTIQUE ET PRODUIT CONTENANT LESDITS COMPOSÉS