Discovery of a New Class of Non-β-lactam Inhibitors of Penicillin-Binding Proteins with Gram-Positive Antibacterial Activity
摘要:
Infections caused by hard-to-treat methicillin-resistant Staphylococcus aureus (MRSA) are a serious global public-health concern, as MRSA has become broadly resistant to many classes of antibiotics. We disclose herein the discovery of a new class of non-beta-lactam antibiotics, the oxadiazoles, which inhibit penicillin-binding protein 2a (PBP2a) of MRSA. The oxadiazoles show bactericidal activity against vancomycin-and linezolid-resistant MRSA and other Gram-positive bacterial strains, in vivo efficacy in a mouse model of infection, and have 100% oral bioavailability.
[EN] COMPOSITIONS AND METHODS FOR MAKING HYBRID POLYPEPTIDES<br/>[FR] COMPOSITIONS ET PROCÉDÉS DE PRÉPARATION DE POLYPEPTIDES HYBRIDES
申请人:UNIV YALE
公开号:WO2020247605A1
公开(公告)日:2020-12-10
Compositions and methods of making hybrid polypeptides and other polymers are disclosed. For example, functionalized tRNA having a functional molecule including a benzoic acid or benzoic acid derivative acylated to the 3' nucleotide of a tRNA are provided. Functionalized tRNA having a functional molecule including a malonic acid or malonic acid derivative acylated to the 3' nucleotide of a tRNA are also provided. Methods of using the functionalized tRNA for making compounds including the functional molecule are also provided. The methods typically include providing or expressing a messenger RNA (mRNA) encoding the target polypeptide in a translation system including one or more functionalized tRNA wherein each functionalized tRNA recognizes at least one codon such that its functional molecule is incorporated into the polypeptide or other polymer during translation. The incorporation of the functional molecule can occur in vitro in a cell-free translation system, or in vivo in a host cell.
[EN] MODULATORS OF FARNESOID X RECEPTOR AND METHODS FOR THE USE THEREOF<br/>[FR] MODULATEURS DU RÉCEPTEUR FARNÉSOÏDE X ET LEURS MÉTHODES D'UTILISATION
申请人:UNIV XIAMEN
公开号:WO2016116054A1
公开(公告)日:2016-07-28
Compounds, compositions and methods are provided for treating the FXR-mediated disease or process in a mammal, comprising administering to the mammal a therapeutically effective amount of a compound claimed, wherein the FXR-mediated disease or condition linked to chronic liver diseases such as nonalcoholic fatty liver disease and nonalcoholic steatohepatitis; gastrointestinal diseases; cardiovascular diseases; metabolic diseases such as diabetes and obesity; inflammation, or cancer etc..
EFFECTIVE SILYLATION OF CARBOXYLIC ACIDS UNDER SOLVENT-FREE CONDITIONS WITH <i>tert</i>-BUTYLDIMETHYLSILYL CHLORIDE (TBDMSCL) AND TRIISOPROPYLSILYL CHLORIDE (TIPSCL)
Various types of carboxylic acids can be converted effectively to their corresponding TBDMS and TIPS esters using TBDMSCI and TIPSCI in the presence of imidazole under solvent-free conditions. The advantage of this modified method in comparison with that reported by Corey is the elimination of DMF, which eliminates aqueous work-up. The method is not a time-consuming process and the reactions proceed spontaneously. By this method, absolute chemoselectivity for the protection of carboxylic acid functions in the presence of 2 degrees, 3 degrees hydroxyl groups are observed.