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.
Abstractmagnified imageA pronounced catalytic effect of sodium dodecyl sulfate (SDS) was observed on thein situproduction ofS‐alkylisothiouronium saltsviathe reaction of primary, allyl and benzyl halides with thiourea in SDS droplets .Hydrolysis of the generatedS‐alkylisothiouronium salts in the palisade layer of the droplets produces the corresponding thiol moieties which are immediately added to the electron‐deficient olefins that are present in the micellar core to produce the thia‐Michael adducts. The entire route is an almost odorless process. The yields of the products are good to excellent and the method is applicable to large‐scale operation without any problem.
Dithiooxamide as an Effective Sulfur Surrogate for Odorless High-Yielding Carbon-Sulfur Bond Formation in Wet PEG200 as an Eco-Friendly, Safe, and Recoverable Solvent
In this study, we have employed dithiooxamide, a solid, odorless, and commercially available compound, as a sulfur surrogate for the preparation of dialkyl sulfides from available alkyl halides in high yields. This sulfur transfer agent was also used for a copper-catalyzed high-yielding preparation of diaryl sulfides from their available aryl halides and for the preparation of thia-Michael adducts
Functional sulfur-containing compounds 2. Synthesis of 3-chloropropyl and 4-chlorobutyl alkyl (phenyl) sulfones by the oxidative chlorination of 3-hydroxypropyl and 4-hydroxybutyl alkyl(phenyl) sulfides and sulfoxides
作者:A. R. Derzhinskii、L. D. Konyushkin、E. N. Prilezhaeva
DOI:10.1007/bf00929230
日期:1978.9
DERZHINSKIJ A. R.; KONYUSHKIN L. D.; PRILEZHAEVA E. N., IZV. AN CCCP. CEP. XIM., 1978, HO 9, 2070-2076
作者:DERZHINSKIJ A. R.、 KONYUSHKIN L. D.、 PRILEZHAEVA E. N.