Challenges in the Development of a Thiol-Based Broad-Spectrum Inhibitor for Metallo-β-Lactamases
摘要:
Pathogens, expressing metallo-beta-lactamases (MBLs), become resistant against most beta-lactam antibiotics. Besides the dragging search for new antibiotics, development of MBL inhibitors would be an alternative weapon against resistant bacterial pathogens. Inhibition of resistance enzymes could restore the antibacterial activity of beta-lactams. Various approaches to MBL inhibitors are described; among others, the promising motif of a zinc coordinating thiol moiety is very popular. Nevertheless, since the first report of a thiol-based MBL inhibitor (thiomandelic acid) in 2001, no steps in development of thiol based MBL inhibitors were reported that go beyond clinical isolate testing. In this study, we report on the synthesis and biochemical characterization of thiol-based MBL inhibitors and highlight the challenges behind the development of thiol-based compounds, which exhibit good in vitro activity toward a broad spectrum of MBLs, selectivity against human off targets, and reasonable activity against clinical isolates.
Stereoselective Preparation of a Cyclopentane-Based NK1 Receptor Antagonist Bearing an Unsymmetrically Substituted Sec−Sec Ether
摘要:
A highly efficient synthesis of the potent and selective NK-1 receptor antagonist 1 is described. The key transformation involved the etherification reaction between cyclopentanol 12 and chiral imidate 30 which was catalyzed by HBF4 to initially give ether 14 as a 17:1 mixture of diastereomers and in 75% combined yield. The diastereoselectivity was upgraded to 109:1 by crystallization of the triethylamine solvate 44 which was isolated in 54% yield from 12. Mechanistic studies confirmed that the etherification reaction proceeds through an unprecedented S(N)2 reaction pathway under typical S(N)1 reaction conditions.
NITROGENOUS HETEROCYCLIC COMPOUND, PREPARATION METHOD, INTERMEDIATE, COMPOSITION, AND APPLICATION
申请人:SHANGHAI PHARMACEUTICALS HOLDING CO., LTD.
公开号:US20200190091A1
公开(公告)日:2020-06-18
A nitrogenous heterocyclic compound, a preparation method, an intermediate, a composition, and an application. The present invention provides a nitrogenous heterocyclic compound as represented by formula I, pharmaceutically acceptable salts thereof, enantiomers thereof, diastereoisomers thereof, tautomers thereof, solvates thereof, metabolites thereof, or prodrugs thereof. The compound has high inhibitory activity against ErbB2 tyrosine kinase, has good inhibitory activity against human breast cancer cells BT-474, human gastric cancer cells NCI-N87 and the like with high expression of ErbB2, and in addition has relatively weak inhibitory activity against EGFR kinase, that is, the compound is an EGFR/ErbB2 double target inhibitor that attenuates EGFR kinase inhibitory activity or a small-molecule inhibitor having selectivity for an ErbB2 target. (I)
[EN] SUBSTITUTED PYRIMIDINES AND METHODS OF USE<br/>[FR] PYRIMIDINES SUBSTITUÉES ET MÉTHODES D'UTILISATION
申请人:THERAVANCE BIOPHARMA R&D IP LLC
公开号:WO2021203131A1
公开(公告)日:2021-10-07
The present disclosure provides inhibitors of activin receptor-like kinase 5 (ALK5). Also disclosed are methods to modulate the activity of ALK5 and methods of treatment of disorders mediated by ALK5.
The present invention provides solid state forms of Linagliptin, processes for preparing the solid state forms, and pharmaceutical compositions thereof.
本发明提供了利那格列汀的固态形式,以及制备这些固态形式和药物组合物的方法。
Discovery and Mechanistic Study of Novel <i>Mycobacterium tuberculosis</i> ClpP1P2 Inhibitors
misfolded proteins plays a critical role in proteome homeostasis. MtbClpP1P2, a ClpP enzyme complex, is required for survival in Mycobacterium tuberculosis, and it is therefore considered as a promising target for the development of antituberculosis drugs. Here, we discovered that cediranib and some of its derivatives are potent MtbClpP1P2 inhibitors and suppress M. tuberculosis growth. Protein pull-down