Inhibition of adhesion molecule expression by N-alkylthiopyridine-benzo[b]thiophene-2-carboxamides
作者:Diane H. Boschelli、David T. Connor、Mark E. Lesch、Denis J. Schrier
DOI:10.1016/0968-0896(96)00046-6
日期:1996.4
The surface levels of ICAM-1 and E-selectin on activated endothelial cells can be reduced by 3-alkoxybenzo[b]thiophene-2-carboxamides. This property is shared by several N-alkylthiopyridine substituted imides. Combining structural elements of these two diverse series lead to a new class of small molecule inhibitors of adhesion molecule expression.
Anhydrolide Macrolides. 1. Synthesis and Antibacterial Activity of 2,3-Anhydro-6-<i>O</i>-methyl 11,12-Carbamate Erythromycin A Analogues
作者:Richard L. Elliott、Daisy Pireh、George Griesgraber、Angela M. Nilius、Patty J. Ewing、Mai Ha Bui、Patti M. Raney、Robert K. Flamm、Ki Kim、Rodger F. Henry、Daniel T. W. Chu、Jacob J. Plattner、Yat Sun Or
DOI:10.1021/jm970547x
日期:1998.5.1
A series of 3-descladinosyl-2,3-anhydro-6-O-methylerythromycin A 11,12-carbamate analogues have been synthesized and evaluated for antibacterial activity. These compounds were found to be potent antibacterial agents against Gram-positive organisms in vitro, many having MIC values below 1 mu g/mL for the macrolide-susceptible Staphylococcus aureus, Streptococcus pyogenes, and Streptococcus pneumoniae, as well as improved activity compared to erythromycin A against the inducibly MLS (macrolide, lincosamide, and streptogramin B)-resistant organisms. Structure-activity studies revealed that arylalkyl carbamates with two and four carbon atoms between the aromatic moiety and carbamate nitrogen have the best in vitro activity. All of the C-10 epi analogues evaluated were found to have substantially less activity than the corresponding natural C-10 isomer. Several analogues demonstrated moderate antibacterial activity against the constitutively resistant S. aureus A-5278, S. pneumoniae 5979, and S. pyogenes 930. However, despite potent in vitro activity, these analogues showed only moderate in vivo activity in mouse protection studies.