双钯催化的还原环化反应。2,2'-,2,3'-和3,3'-Bi-1 H-吲哚,Indolo [3,2- b ]吲哚和Indolo [2,3- b ]吲哚的合成
摘要:
钯催化的一氧化碳介导的1,4-,1,3-和2,3-双(2-硝基芳基)-1,3-丁二烯的双还原环化反应得到2,2'-,2,3分别开发了'-和3,3'-双吲哚。相反,1,2-双(2-硝基芳基)乙烯的还原环化是非选择性的,提供了单环吲哚,吲哚[3,2- b ]吲哚,吲哚[1,2 - c ]喹唑啉-6(5 H)的混合物。)-和5,11-二氢-6 H-吲哚并[3,2 - c ]喹啉-6-。从1,1-双(2-硝基芳基)乙烯的还原环化反应还观察到非选择性产物的形成,生成吲哚[2,3- b ]吲哚和吲哚[2,3- c]] quinolin-6-ones。从1,1-或1,2-双(2-硝基芳基)乙烯开始,插入一氧化碳以产生含羰基的产物是主要或唯一的反应路径。
[EN] ANTI-BACTERIAL PYRUVATE KINASE MODULATOR COMPOUNDS, COMPOSITIONS, USES AND METHODS<br/>[FR] COMPOSÉS ANTIBACTÉRIENS MODULATEURS DE LA PYRUVATE KINASE, COMPOSITIONS, UTILISATIONS ET PROCÉDÉS ASSOCIÉS
申请人:UNIV FRASER SIMON
公开号:WO2016004513A8
公开(公告)日:2016-02-25
Discovery and optimization of a new class of pyruvate kinase inhibitors as potential therapeutics for the treatment of methicillin-resistant Staphylococcus aureus infections
作者:Nag S. Kumar、Edie M. Dullaghan、B. Brett Finlay、Huansheng Gong、Neil E. Reiner、J. Jon Paul Selvam、Lisa M. Thorson、Sara Campbell、Nicholas Vitko、Anthony R. Richardson、Roya Zoraghi、Robert N. Young
DOI:10.1016/j.bmc.2014.01.020
日期:2014.3
A novel series of bis-indoles derived from naturally occurring marine alkaloid 4 were synthesized and evaluated as inhibitors of methicillin-resistant Staphylococcus aureus (MRSA) pyruvate kinase (PK). PK is not only critical for bacterial survival which would make it a target for development of novel antibiotics, but it is reported to be one of the most highly connected 'hub proteins' in MRSA, and thus should be very sensitive to mutations and making it difficult for the bacteria to develop resistance. From the co-crystal structure of cis-3-4-dihydrohamacanthin B (4) bound to S. aureus PK we were able to identify the pharmacophore needed for activity. Consequently, we prepared simple direct linked bis-indoles such as 10b that have similar anti-MRSA activity as compound 4. Structure-activity relationship (SAR) studies were carried out on 10b and led us to discover more potent compounds such as 10c, 10d, 10k and 10m with enzyme inhibiting activities in the low nanomolar range that effectively inhibited the bacteria growth in culture with minimum inhibitory concentrations (MIC) for MRSA as low as 0.5 mu g/ml. Some potent PK inhibitors, such as 10b, exhibited attenuated antibacterial activity and were found to be substrates for an efflux mechanism in S. aureus. Studies comparing a wild type S. aureus with a construct (S. aureus LAC Delta pyk::ErmR) that lacks PK activity confirmed that bactericidal activity of 10d was PK-dependant. (C) 2014 Elsevier Ltd. All rights reserved.
ANTI-BACTERIAL PYRUVATE KINASE MODULATOR COMPOUNDS, COMPOSITIONS, USES AND METHODS
申请人:SIMON FRASER UNIVERSITY
公开号:US20170216252A1
公开(公告)日:2017-08-03
Compounds of general formula I that are capable of inhibiting bacterial pyruvate kinase and/or bacterial growth. The compounds may find use as antibacterial agents in therapeutic and/or non-therapeutic contexts.