81927-55-1Relevant articles and documents
Hit-to-lead optimization of novel benzimidazole phenylacetamides as broad spectrum trypanosomacides
Avery, Vicky M.,Baell, Jonathan,McNamara, Nicole,Rahmani, Raphael,Sykes, Melissa L.
supporting information, p. 685 - 695 (2020/08/24)
Trypanosoma cruzi and Trypanosoma brucei are the parasitic causative agents of Chagas disease and human African trypanosomiasis (HAT), respectively. The drugs currently used to treat these diseases are not efficacious against all stages and/or parasite sub-species, often displaying side effects. Herein, we report the SAR exploration of a novel hit, 2-(4-chlorophenyl)-N-(1-propyl-1H-benzimidazol-2-yl)acetamide previously identified from high throughput screens against T. cruzi, Trypanosoma brucei brucei and Leishmania donovani. An informative set of analogues was synthesized incorporating key modifications of the scaffold resulting in improved potency whilst the majority of compounds retained low cytotoxicity against H9c2 and HEK293 cell lines. The SAR observed against T. cruzi broadly matches that observed against T.b. brucei, suggesting the possibility for a broad-spectrum candidate. This class of compounds therefore warrants further investigation towards development as a treatment for Chagas disease and HAT. This journal is
Synthesis of 3-deoxy-2-uloses via the indium-mediated allylation reaction
Gintner, Manuel,Denner, Christian,Schm?lzer, Christoph,Fischer, Michael,Frühauf, Peter,K?hlig, Hanspeter,Schmid, Walther
, (2019/05/15)
Abstract: We utilized the indium-mediated allylation reaction for the synthesis of carbohydrate structures containing the 3-deoxy-2-ulose motif, a barely investigated compound class. The stereoselective outcome can be controlled by the presence or absence of a chelating group in α-position to the carbonyl function. By introduction of an UV-active allyl building block, we enabled epimer separation by HPLC towards the synthesis of 3-deoxy-d-glycero-d-galacto-2-nonulose, the carboxyl-reduced analogue of widely distributed 3-deoxy-d-glycero-d-galacto-nonulosonic acid (Kdn). Ozonolysis of the introduced 2-C-methylidenepropan-1-ol motif provided the desired 3-deoxy-2-uloses. Graphical abstract: [Figure not available: see fulltext.].
Br?nsted acid catalyzed monoalkylation of anilines with trichloroacetimidates
Wallach, Daniel R.,Stege, Patrick C.,Shah, Jigisha P.,Chisholm, John D.
, p. 1993 - 2000 (2015/02/19)
Trichloroacetimidates are useful alkylating agents for aromatic amines, requiring only a catalytic amount of a Br?nsted acid to facilitate the reaction. Monoalkylation predominates under these conditions. Electron-poor anilines provide superior yields, with electron-rich anilines sometimes showing competitive Friedel-Crafts alkylation. A single flask protocol with formation of the imidate in situ is demonstrated, providing a convenient method for the direct substitution of alcohols with anilines. Reaction with a chiral imidate favors a mechanism that proceeds through a carbocation intermediate.