Abstract: Rifamycin derivatives having the following structure of general formula I (both hydroquinone and corresponding quinone (C1-C4) forms): or its salts, hydrates or prodrugs thereof; wherein a preferred R1 comprises hydrogen or acetyl and a prefered R2 comprises hydrogen, methyl or other lower alkyls; wherein asterik (*) denotes the carbon bearing the chiral center, wherein absolute configuration is assigned as R or S. Methods of preparation of the aforementioned rifamycin derivatives are also described. The compounds exhibit antimicrobial activities, including activities against drug-resistant microorganisms.

Abstract: Novel rifamycin derivatives of formula I (both hydroquinone and corresponding quinone (C1-C4) forms): or their salts, hydrates or prodrugs thereof, wherein: a preferred R comprises hydrogen, acetyl; L is a linker, a preferred linker group elements selected from any combination of 1 to 5 groups shown FIG. 1, provided L is not wherein R1 is H, methyl or alkyl. The inventive compounds exhibit valuable antibiotic properties. Formulations having these compounds can be used in the control or prevention of infectious diseases in mammals, both humans and non-humans. In particular, the compounds exhibit a pronounced antibacterial activity, even against multiresistant strains of microbes.

Abstract: Compounds of the current invention relate to rifamycin derivatives having antimicrobial activities, including activities against drug-resistant microorganisms. More specifically, compounds of the current invention relate to a series of novel spiro rifamycin derivatives which have demonstrated potent antimicrobial activity.

Abstract: Antibacterial compounds with improved pharmacokinetic profiles having formula (I) and salts, prodrugs, and salts of prodrugs thereof, processes for making the compounds and intermediates used in the processes, compositions containing the compounds, and methods for prophylaxis and treatment of bacterial infections using the compounds are disclosed.

Abstract: Rifamycin derivatives having antimicrobial activities, including activities against drug-resistant microorganisms are claimed in this invention. The inventive rifamycin derivatives are uniquely designed in that they have a rifamycin moiety covalently linked to a linker group through the C-3 carbon of the rifamycin moiety and the linker is, in turn covalently linked to a therapeutic moiety or antibacterial agent/pharmacophore. The therapeutic moiety can be a quinolone, an oxazolidinone, a macrolide, an aminoglycoside, a tetracycline core or a structure/pharmacophore associated with an antibacterial agent.

Abstract: Compounds of the current invention relate to rifamycin derivatives having antimicrobial activities, including activities against drug-resistant microorganisms. More specifically, compounds of the current invention relate to C-25 carbamate derivatives of rifamycin having another functional group or pharmacophore covalently attached to this position through a carbamate linkage. The resulting compounds exert their antimicrobial activity through a dual-function mechanism and therefore exhibit reduced frequency of resistance.

Abstract: The present invention relates to rifamycin 3-iminomethylenyl (—CH?N—) derivatives having antimicrobial activities, including activities against drug-resistant microorganisms. The claimed rifamycin derivative has a rifamycin moiety covalently linked to a linker through an iminomethylenyl (—CH?N—) group at the C-3 carbon of the rifamycin moiety and the linker is, in turn, covalently linked to a quinolone structure or its pharmacophore within the DNA gyrase and topoisomerase IV inhibitor family. The inventive rifamycins are novel and exhibit activity against both rifampin and ciprofloxacin-resistant microorganisms.

Abstract: The invention relates to novel methods for using macrolide anti-infective agents. The macrolide anti-infective agents demonstrate antibacterial activity against multi-drug resistant strains of bacteria and, in particular, methicillin-resistant Staphylococcus aureus (MRSA). Methods for inhibiting the activity of multi-drug resistant bacterial organisms and methods for treating a bacterial infection caused by such organisms are described herein.

Abstract: The invention relates to rifamycin derivatives having antimicrobial activities, including activities against drug-resistant microorganisms, specifically, the rifamycin derivatives having an oxime group at the C-11 position.

Abstract: The current invention relates to a series of rifamycin derivatives having antimicrobial activities, including activities against drug-resistant microorganisms, specifically, the 3,4-cyclo-rifamycin derivatives having an oxime group at the C-11 position.

Abstract: Antibacterial compounds having formula (I) and formula (II) and salts, prodrugs, and salts of prodrugs thereof, processes for making the compounds and intermediates used in the processes, compositions containing the compounds, and methods for prophylaxis or treatment of bacterial infections using the compounds are disclosed.

Abstract: Fluorescent probes that have binding affinity to ribosomes. The fluorescent probes are useful tools for identifying small molecules that bind to the 50S or 30S subunits of the bacterial and other ribosomes and serve as novel ribosome inhibitors. These probes are also useful for determining the interactions between a specific ligand and the ribosome.

Abstract: Antibacterial compounds having formula (I) and salts, prodrugs, and salts of prodrugs thereof, processes for making the compounds and intermediates used in the processes, compositions containing the compounds, and methods for prophylaxis or treatment of bacterial infections using the compounds are disclosed.

Abstract: Antibacterials having formula (I) and salts, prodrugs, and salts of prodrugs thereof, processes for making the compounds and intermediates used in the processes, compositions containing the compounds, and methods of prophylaxis and treatment of bacterial infections using the compounds are disclosed.

Abstract: Compounds of formula (I) formula (II) formula (III) and formula (IV) or pharmaceutically acceptable salts or prodrugs thereof, are antibacterial agents. Compositions containing the compounds, processes for making the compounds, synthetic intermediates employed in the processes, and methods for treatment and prevention of bacterial infections are disclosed.

Abstract: Antibacterials having formula (I) 1

Abstract: Antibacterial compounds with improved pharmacokinetic profiles having formula (I) 1

Abstract: Antibacterial compounds having formula (I) 1

Abstract: Antibacterial compounds having formula (I) 1

Abstract: Antibacterial compounds having formula (I) 1