Successful application of serum shift prediction models to the design of dual targeting inhibitors of bacterial gyrase B and topoisomerase IV with improved in vivo efficacy
摘要:
A series of dual targeting inhibitors of bacterial gyrase B and topoisomerase IV were identified and optimized to mid-to-low nanomolar potency against a variety of bacteria. However, in spite of seemingly adequate exposure achieved upon IV administration, the in vivo efficacy of the early lead compounds was limited by high levels of binding to serum proteins. To overcome this limitation, targeted serum shift prediction models were generated for each subclass of interest and were applied to the design of prospective analogs. As a result, numerous compounds with comparable antibacterial potency and reduced protein binding were generated. These efforts culminated in the synthesis of compound 10, a potent inhibitor with low serum shift that demonstrated greatly improved in vivo efficacy in two distinct rat infection models. (C) 2014 Elsevier Ltd. All rights reserved.
NiCl2(PMe3)2-Catalyzed Borylation of Aryl Chlorides
摘要:
The cross-coupling of aryl chlorides and bis(pinacolato)diboron was achieved using NiCl2(PMe3)(2) catalyst In the presence of metal 2,2,2-trifluoroethoxide. The catalyst smoothly provided the desired products regardless of a variety of functional groups and substituted positions.
aliphatic substrates for selective C(sp3)–H bond borylations. Heterocyclic molecules are selectively borylated using the inherently elevated reactivity of the C–H bonds. A number of late-stage C–H functionalization have been described using the same catalysts. Furthermore, we show that one of the catalysts could be used even in open air for the C(sp2)–H and C(sp3)–Hborylations enabling the method more general
Acyl‐Directed
<i>ortho</i>
‐Borylation of Anilines and C7 Borylation of Indoles using just BBr
<sub>3</sub>
作者:Saqib A. Iqbal、Jessica Cid、Richard J. Procter、Marina Uzelac、Kang Yuan、Michael J. Ingleson
DOI:10.1002/anie.201909786
日期:2019.10.21
notably proceeds with C6 substituted indoles. The directing group can be readily removed in situ and the products isolated as the pinacol boronate esters. Acyl‐directed electrophilic borylation can be extended to carbazoles and anilines with excellent ortho selectivity. 4‐amino‐indoles are amenable to this process, with acyl group installation and directed electrophilic C−H borylation enabling selective
The cross-coupling of aryl chlorides and bis(pinacolato)diboron was achieved using NiCl2(PMe3)(2) catalyst In the presence of metal 2,2,2-trifluoroethoxide. The catalyst smoothly provided the desired products regardless of a variety of functional groups and substituted positions.