作者:Paul B. Jones、Nikki M. Parrish、Todd A. Houston、Anthony Stapon、Niharika P. Bansal、James D. Dick、Craig A. Townsend
DOI:10.1021/jm000149l
日期:2000.8.1
Long-chain lipid envelopes are characteristic of mycobacteria such as those that cause tuberculosis and leprosy. Inhibition of fatty acid synthesis or elongation is a strategy demonstrated to be clinically effective against M. tuberculosis. A new class of compounds designed to inhibit the beta-ketoacyl synthase reaction of fatty acid synthesis has been developed. Of >30 compounds described, the most active were acetamides containing alkylsulfonyl substituents. Inhibitory activities were acutely sensitive to net charge, chain length, and degree of unsaturation. The most active compound 5 (alkyl = C-10) contained a single methylene spacer between the sulfone and carboxamide and exhibited an MIC of 0.75-1.5 mu g/mL, comparable to first-line antituberculosis drugs. These compounds are species-specific, exhibiting no significant activity against bacterial species other than M. tuberculosis and closely related strains. The synthesis, biological activity, and specificity of these compounds are described.
Sulfur makes the difference: synthesis and mesomorphic properties of novel thioether-functionalized imidazolium ionic liquid crystals
作者:Markus Mansueto、Katharina Christina Kreß、Sabine Laschat
DOI:10.1016/j.tet.2014.03.050
日期:2014.9
thioether-linked imidazoliumionicliquid crystals were synthesized starting from methyl 2-mercaptoacetate. The mesomorphicproperties were determined by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction. All mesogens displayed smectic A mesophase geometries with strongly interdigitated bilayer structures. Comparison of the thioether-linked imidazolium salts with