Synthetic studies towards tragoponol: preparation of a highly functionalized resorcylate
摘要:
Studies on the synthesis of racemic tragoponol are described. The western resorcylate unit of tragoponol was efficiently constructed from appropriate diketo-dioxinone and secondary alcohol intermediates using a ketene generation-trapping and aromatization sequence. Further functionalization provided an advanced diketo-dioxinone intermediate which upon desilylation resulted in the formation of a dihydroisocoumarin. (C) 2013 Elsevier Ltd. All rights reserved.
Identification, Design and Biological Evaluation of Bisaryl Quinolones Targeting <i>Plasmodium falciparum</i> Type II NADH:Quinone Oxidoreductase (PfNDH2)
作者:Chandrakala Pidathala、Richard Amewu、Bénédicte Pacorel、Gemma L. Nixon、Peter Gibbons、W. David Hong、Suet C. Leung、Neil G. Berry、Raman Sharma、Paul A. Stocks、Abhishek Srivastava、Alison E. Shone、Sitthivut Charoensutthivarakul、Lee Taylor、Olivier Berger、Alison Mbekeani、Alasdair Hill、Nicholas E. Fisher、Ashley J. Warman、Giancarlo A. Biagini、Stephen A. Ward、Paul M. O’Neill
DOI:10.1021/jm201179h
日期:2012.3.8
the selection of 2-bisaryl 3-methyl quinolones as a series for further biological evaluation. The lead compound within this series 7-chloro-3-methyl-2-(4-(4-(trifluoromethoxy)benzyl)phenyl)quinolin-4(1H)-one (CK-2-68) has antimalarialactivity against the 3D7 strain of P. falciparum of 36 nM, is selective for PfNDH2 over other respiratory enzymes (inhibitory IC50 against PfNDH2 of 16 nM), and demonstrates
Design, Synthesis, and Biochemical Characterization of Non-Native Antagonists of the <i>Pseudomonas aeruginosa</i> Quorum Sensing Receptor LasR with Nanomolar IC<sub>50</sub> Values
作者:Daniel E. Manson、Matthew C. O’Reilly、Kayleigh E. Nyffeler、Helen E. Blackwell
DOI:10.1021/acsinfecdis.9b00518
日期:2020.4.10
illuminate its role in P. aeruginosa virulence, but we currently lack highly potent and selective LasR antagonists, despite considerable research in this area. V-06-018, an abiotic small molecule discovered in a high-throughput screen, represents one of the most potent known LasR antagonists but has seen little study since its initial report. Herein, we report a systematic study of the structure-activity relationships
Developing new therapeutic strategies to overcome drug resistance of cancer cells is an ongoing endeavor. From among 2 million chemicals, we identified ethyl 4-oxo-2-phenyl-1,4-dihydroquinoline-6-carboxylate (AS1712) as a low-toxicity inhibitor of lung cancer cell proliferation and xenograft tumor growth. We show that AS1712 is active against broad cancer cell lines and is able to bind in the colchicine-binding
Copper-catalyzed, silver-mediated formal [3+2] cycloaddition of simple alkynes with β-ketoesters through propargylic C(sp<sup>3</sup>)–H functionalization
作者:Zhen-Ting Liu、Xiang-Ping Hu
DOI:10.1039/c8cc08013e
日期:——
thus providing a variety of highly functionalized furans in moderate to high yields. This represents the first successful example of the catalytic propargylic cycloaddition of simple alkynes with bisnucleophiles based on the propargylic C(sp3)–H functionalization strategy.
通过炔丙基的C(sp 3)–H官能化,实现了铜催化的炔烃与β-酮酸酯的炔丙基[3 + 2]环加成反应。在CuI与1,10-菲咯啉水合物作为配体和Ag 2 CO 3作为双功能试剂(氧化剂和碱)的催化下,反应可在较宽的底物范围内顺利进行,从而提供了多种高官能度的呋喃中度到高产。这代表了基于炔丙基C(sp 3)-H官能化策略的简单炔烃与双亲核试剂催化炔丙基环加成的第一个成功实例。
作者:Harvey I. Skulnick、Sheldon D. Weed、Emerson E. Eidson、Harold E. Renis、Dale A. Stringfellow、Wendell Wierenga
DOI:10.1021/jm00150a018
日期:1985.12
2-amino-5-bromo-6-phenyl-4(3H)-pyrimidinone. An analogue study incorporating a series of 2-amino-5-substituted-6-arylpyrimidinones revealed that the most potent interferon inducers were mono- and difluorophenyl analogues. These same analogues were also potent antiviral agents against Semliki Forest virus and herpes simplex type 1. In addition the monomethoxyphenyl analogues were potent antiviral agents but weak interferon