From Serendipity to Rational Antituberculosis Drug Discovery of Mefloquine-Isoxazole Carboxylic Acid Esters
作者:Jialin Mao、Hai Yuan、Yuehong Wang、Baojie Wan、Marco Pieroni、Qingqing Huang、Richard B. van Breemen、Alan P. Kozikowski、Scott G. Franzblau
DOI:10.1021/jm900340a
日期:2009.11.26
Both in vitro and in vivo metabolism studies suggested that 5-(2,8-bis(trifluoromethyl)quinolin-4-yloxymethyl)isoxazole-3-carboxylic acid ethyl ester (compound 3) with previously reported anti-tuberculosis activity is rapidly converted to two metabolites 3a and 3b. In order to improve the metabolic stability of this series, chemistry efforts were focused on the modification of the oxymethylene linker of compound 3 in the present study. Compound 9d with an alkene linker was found to be both more metabolically stable and more potent than compound 3, with a minimum inhibitory concentration (MIC) of 0.2 mu M and 2.6 mu M against replicating and nonreplicating Mycobaterium tuberculosis, respectively. These attributes make 9d ail interesting lead compound. A number of modifications were made to the structure of 9d, and it series of active Compounds were discovered. Although some neurotoxicity was observed at it high dosage, this new series was endowed with both improved in vitro anti-TB activity and metabolic stability in comparison to compound 3.
Bravo,P. et al., Gazzetta Chimica Italiana, 1976, vol. 106, p. 743 - 759
作者:Bravo,P. et al.
DOI:——
日期:——
Synthesis, Biological Evaluation, and Structure−Activity Relationships for 5-[(<i>E</i>)-2-Arylethenyl]-3-isoxazolecarboxylic Acid Alkyl Ester Derivatives as Valuable Antitubercular Chemotypes
作者:Marco Pieroni、Annamaria Lilienkampf、Baojie Wan、Yuehong Wang、Scott G. Franzblau、Alan P. Kozikowski
DOI:10.1021/jm900513a
日期:2009.10.22
agents, which are active against both the replicating form of Mtb (R-TB) and NRP-TB, are urgently needed. Herein, we report the synthesis and structure−activityrelationships (SAR) of a series of 5-[(E)-2-arylethenyl]-3-isoxazolecarboxylic acid alkyl esters as potent anti-TB agents. Several compounds had submicromolar minimum inhibitory concentrations (MIC) against R-TB and were active against NRP-TB