A class of 7-oxo-2,6-diazabicyclo-[3.2.0]-heptane-6-sulfonic acid compounds substituted at the two position of the bicyclic ring with a heterocyclylaminocarbonyl group or a carbocyclylaminocarbonyl group are β-lactamase inhibitors. The compounds and their prodrugs and pharmaceutically acceptable salts are useful in the treatment of bacterial infections in combination with β-lactam antibiotics. In particular, the compounds are suitable for use with β-lactam antibiotics (e.g., imipenem and ceftazidime) against micro-organisms resistant to β-lactam antibiotics due to the presence of the β-lactamases.
Regulating the stereoselectivity of medium-chain dehydrogenase/reductase by creating an additional active pocket accommodating prochiral heterocyclic ketones
作者:Lei Qin、Xin Su、Jun Wang、Lunjie Wu、Man Zou、Jie Gu、Yan Xu、Yao Nie
DOI:10.1039/d3cc04361d
日期:——
However, the regulatory mechanism of stereoselective complementary reduction of heterocyclic ketones by carbonyl reductase (CR) is unclear. Structure-guided creation of an additional substrate-binding active pocket inversed the stereoselectivity of SpCR from Spathaspora passalidarum. The mutant m48 showed improved catalytic activity towards the 12 tested heterocyclic ketones (conversion rate >99%, ee value
Enantioselective Regulation of Short‐Chain Dehydrogenases via Key Sites in its Loop and Adjacent Regions for the Enantiodivergent Reduction of Difficult‐To‐Reduce Ketones
作者:Lei Qin、Xin Su、Jun Wang、Lunjie Wu、Man Zou、Jie Gu、Yan Xu、Yao Nie
DOI:10.1002/adsc.202300904
日期:2023.12.5
in fine-tuning the enantioselectivity of SDRs. Understanding this mechanism of SDR stereo preference in catalyzing asymmetric reduction, we further switched the enantioselectivity of the homologous enzymes. The obtained enzymescatalyzed the enantiodivergent synthesis of chiral heterocyclicalcohols with different ring sizes and substituents (25–99% conversion and 25–99% ee (R/S)), including piperidols
Development of an Immobilized Ketoreductase for Enzymatic (<i>R</i>)-1-(3,5-Bis(trifluoromethyl)phenyl)ethanol Production
作者:Hongmei Li、Johannah Moncecchi、Matthew D. Truppo
DOI:10.1021/op5003215
日期:2015.7.17
The development of an immobilized ketoreductase via covalent binding on resin EC-HFA has demonstrated that it is highly active and stable in organic solvents and can be recycled and reused many times in both batch mode and flow reactor mode. (R)-1-(3,5-Bis(trifluoromethyl)phenyl)ethanol, a key chiral intermediate in the synthesis of EMEND, was synthesized in 98% yield with >99% ee using the immobilized ketoreductase in a 50% hexanes/40% IPA/10% water solvent system. The immobilized ketoreductase has also been applied to the synthesis of various chiral alcohols.
[EN] NOVEL INHIBITORS OF BETA-LACTAMASE<br/>[FR] NOUVEAUX INHIBITEURS DE BÊTA-LACTAMASE
申请人:MERCK & CO INC
公开号:WO2008039420A2
公开(公告)日:2008-04-03
[EN] A class of 7-oxo-2,6-diazabicyclo-[3.2.0]-heptane-6-sulfonic acid compounds substituted at the two position of the bicyclic ring with a heterocyclylaminocarbonyl group or a carbocyclylaminocarbonyl group are ß-lactamase inhibitors. The compounds and their prodrugs and pharmaceutically acceptable salts are useful in the treatment of bacterial infections in combination with ß-lactam antibiotics. In particular, the compounds are suitable for use with ß-lactam antibiotics (e.g., imipenem and ceftazidime) against micro-organisms resistant to ß-lactam antibiotics due to the presence of the ß-lactamases. [FR] L'invention concerne une classe de composés d'acide 7-oxo-2,6-diazabicyclo-[3.2.0]-heptane-6-sulfonique, substitués à la position 2 du noyau bicyclique par un groupe hétérocyclylaminocarbonyle ou un groupe carbocyclylaminocarbonyle, qui sont des inhibiteurs de bêta-lactamase. Ces composés, ainsi que leurs promédicaments et leurs sels pharmaceutiquement acceptables, sont utiles dans le traitement d'infections bactériennes lorsqu'ils sont associés à des antibiotiques bêta-lactame (p. ex. imipenem and ceftazidime) pour lutter contre des micro-organismes résistants aux antibiotiques bêta-lactame, du fait de la présence des bêta-lactamases.