A compound represented by the general formula: ##STR1## wherein R.sup.1 and R.sup.2 denote a halogen atom or hydrogen atom; R.sup.3 means a hydrogen atom or lower alkyl group; l, r and m stand for 0 or 1; A is N or CH; W denotes an aromatic ring or a condensed ring thereof; X means another aromatic ring, an alkanediyl group, an alkenediyl group, or an alkynediyl group; Y stand for --S--, etc.; Z denotes a hydrogen atom, etc., or a salt thereof, and intermediates thereof or a salt thereof as well as processes for the preparation thereof, and pharmacetical composition suitable for use as an antifungal agent.
An efficientsynthesis of novel type of dipyrido-1,4-thiazine (4) was elaborated in the reactions of two pairs of 3,4-disubstituted pyridines in DMF. The reactions proceeded through the S→N type of the Smiles rearrangement of the resulting 4,4'-dipyridinyl sulfide. In the case of formation of 10-(3'-nitro-4'- pyridinyl)-2,7-diazaphenothiazine (5) double rearrangement was observed. 10H- 2,7-diazaphenothiazine
Compounds of the formula [I] ##STR1## in which R.sup.1 is hydroxy, a protected hydroxy or lower alkoxy group, R.sup.2 is carboxy or an easily eliminable esterified carboxy group and R.sup.3 is pyridyl, and pharmaceutically acceptable salts thereof, having antimicrobial and .beta.-lactamase inhibiting properties, and pharmaceutical compositions containing the same.
Design, Synthesis, and Structure–Activity Relationship Studies of Novel Thioether Pleuromutilin Derivatives as Potent Antibacterial Agents
作者:Chenyu Ling、Liqiang Fu、Suo Gao、Wenjing Chu、Hui Wang、Yanqin Huang、Xiaoyan Chen、Yushe Yang
DOI:10.1021/jm500312x
日期:2014.6.12
A series of novel thioether pleuromutilin derivatives incorporating various heteroaromatic substituents into the C14 side chain have been reported. Structure–activity relationship (SAR) studies resulted in compounds 52 and 55 with the most potent in vitro antibacterial activity among the series (MIC = 0.031–0.063 μg/mL). Further optimization to overcome the poor water solubility of compound 55 resulted