of our chemical library to discover new molecules exhibiting in vitro activity against the invasion of host cells by Eimeria tenella revealed a lead compound with an IC50 of 15μM. Structure-activity relationship studies were conducted with 34 newly synthesized compounds to identify more active molecules and enhance in vitro activity against the parasite. Four compounds were more effective in inhibiting
Synthesis, Nicotinic Acetylcholine Receptor Binding, and Antinociceptive Properties of 2-<i>e</i><i>xo</i>-2-(2‘,3‘-Disubstituted 5‘-pyridinyl)-7-azabicyclo[2.2.1]heptanes: Epibatidine Analogues
作者:F. Ivy Carroll、Jeffrey R. Lee、Hernán A. Navarro、Wei Ma、Lawrence E. Brieaddy、Philip Abraham、M. I. Damaj、Billy R. Martin
DOI:10.1021/jm0202268
日期:2002.10.1
3'-positions showed affinities at the nAChR similar to epibatidine. However, in vivo efficacy did not correlate with affinity. 2-exo-(3'-Amino-2'-chloro-5'-pyridinyl)-7-azabicyclo[2.2.1]heptane (2i), an epibatidine analogue possessing an electron-releasing amino group in the 3'-position, produced the highest affinity. Compound 2i was also the most selective epibatidine analogue with a K(i) of 0.001 nM at alphabeta
Phenotyping Reveals Targets of a Pseudo‐Natural‐Product Autophagy Inhibitor
作者:Daniel J. Foley、Sarah Zinken、Dale Corkery、Luca Laraia、Axel Pahl、Yao‐Wen Wu、Herbert Waldmann
DOI:10.1002/anie.202000364
日期:2020.7.20
Pseudo‐natural‐product (NP) design combines naturalproduct fragments to provide unprecedented NP‐inspired compounds not accessible by biosynthesis, but endowed with biological relevance. Since the bioactivity of pseudo‐NPs may be unprecedented or unexpected, they are best evaluated in target agnostic cell‐based assays monitoring entire cellular programs or complex phenotypes. Here, the Cinchona alkaloid
The Iodination of Certain Phenylsulfonamido- and Amino-heterocycles<sup>1</sup>
作者:Robert G. Shepherd、Catherine E. Fellows
DOI:10.1021/ja01181a046
日期:1948.1
Double Sonogashira reactions on dihalogenated aminopyridines for the assembly of an array of 7-azaindoles bearing triazole and quinoxaline substituents at C-5: Inhibitory bioactivity against Giardia duodenalis trophozoites
作者:Tlabo C. Leboho、Somnath Giri、Inessa Popova、Ian Cock、Joseph P. Michael、Charles B. de Koning
DOI:10.1016/j.bmc.2015.05.024
日期:2015.8
The synthesis of 2,3,5-trisubstituted 7-azaindoles as well as 2,5-disubstituted 7-azaindoles from 3,5-dihalogenated 2-aminopyridines is outlined. Using a double Sonogashira coupling reaction on 2-amino-3,5-diiodopyridine followed by the Cacchi reaction the synthesis of 2,3,5-trisubstituted 7-azaindoles was accomplished. In addition, using two sequential Sonogashira coupling reactions on 2-amino-5-bromo-3-iodopyridine and a potassium t-butoxide mediated ring closure reaction resulted in the assembly of 2,5-disubstituted 7-azaindoles. The 5-alkynyl substituent of the azaindole was easily converted into both quinoxaline and triazole substituents, the latter utilizing an alkyne-azide cycloaddition reaction. Some of these azaindole derivatives showed very promising biological activity against the gastrointestinal protozoal parasite Giardia duodenalis. (C) 2015 Elsevier Ltd. All rights reserved.