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10 Results Found

  • Article
  • Open Access
24 Citations
10,406 Views
11 Pages

Synthesis and Crystal Structures of Benzimidazole-2-thione Derivatives by Alkylation Reactions

  • El Sayed H. El Ashry,
  • Yeldez El Kilany,
  • Nariman M. Nahas,
  • Assem Barakat,
  • Nadia Al-Qurashi,
  • Hazem A. Ghabbour and
  • Hoong-Kun Fun

22 December 2015

Alkylated, benzylated and bromoalkylated benzimidazole-thione that intramolecularly heterocyclized to 3,4-dihydro-2H-[1,3]thiazino[3,2-a]benzimidazole were synthesized. The chemical structure of the synthesized product was characterized by Infra Red,...

  • Article
  • Open Access
6 Citations
5,730 Views
9 Pages

17 July 2012

A series of benzimidazole-2-thione derivatives was synthesized using a reaction between the macrocyclic aminal 16H,13H-5:12,7:14-dimethanedibenzo[d,i]-[1,3,6,8] tetraazecine (DMDBTA, 5) and various nucleophiles in the presence of carbon disulfide. A...

  • Article
  • Open Access
25 Citations
5,932 Views
21 Pages

Expression, Purification, and Comparative Inhibition of Helicobacter pylori Urease by Regio-Selectively Alkylated Benzimidazole 2-Thione Derivatives

  • Salih Osman Mohammed,
  • Sayed H. El El Ashry,
  • Asaad Khalid,
  • Mohamed R. Amer,
  • Ahmed M. Metwaly,
  • Ibrahim H. Eissa,
  • Eslam B. Elkaeed,
  • Ahmed Elshobaky and
  • Elsayed E. Hafez

27 January 2022

The urease enzyme has been an important target for the discovery of effective pharmacological and agricultural products. Thirteen regio-selectively alkylated benzimidazole-2-thione derivatives have been designed to carry the essential features of ure...

  • Review
  • Open Access
10 Citations
5,830 Views
15 Pages

13C-NMR Chemical Shifts in 1,3-Benzazoles as a Tautomeric Ratio Criterion

  • Efrén V. García-Báez,
  • Itzia I. Padilla-Martínez,
  • Alejandro Cruz and
  • Martha C. Rosales-Hernández

23 September 2022

Benzimidazole is an important heterocyclic fragment, present in many biologically active compounds with a great variety of therapeutic purposes. Most of the benzimidazole activities are explained through the existence of 1,3-tautomeric equilibrium. A...

  • Communication
  • Open Access
4 Citations
6,382 Views
4 Pages

26 August 2021

Here we describe the preparation of 2-(4-((1H-benzo[d]imidazol-2-yl)thio)-benzylidene)-hydrazine-1-carbothioamide in two steps. In the first step, 1,3-dihydro-2H-1,3-benzimidazole-2-thione was reacted with 4-fluorobenzaldehyde in DMSO to get 4-[(1H-b...

  • Article
  • Open Access
15 Citations
9,901 Views
7 Pages

New Route to 3-Alkylthiazolo[3,2-a]benzimidazole Derivatives

  • Christian Roussel,
  • Federico Andreoli,
  • Mihaela Roman,
  • Maria Hristova and
  • Nicolas Vanthuyne

28 February 2005

3-Alkyl-thiazolo[3,2-a]benzimidazole derivatives are obtained in high yieldsvia the corresponding 4-alkyl-N-3-(2-aminophenyl)-thiazoline-2-thiones which are easilyprepared from 1,2-diaminobenzene, CS2 and halogenoketones. This new route comparesadvan...

  • Article
  • Open Access
34 Citations
9,170 Views
8 Pages

24 August 2016

Benzoic acid and o-phenylenediamine efficiently reacted under the green solvent-free Ball Milling method. Several reaction parameters were investigated such as rotation frequency; milling balls weight and milling time. The optimum reaction condition...

  • Article
  • Open Access
14 Citations
5,003 Views
22 Pages

Thiourea-Derived Chelating Ligands and Their Organometallic Compounds: Investigations into Their Anticancer Activity

  • Kelvin K. H. Tong,
  • Muhammad Hanif,
  • James H. Lovett,
  • Katja Hummitzsch,
  • Hugh H. Harris,
  • Tilo Söhnel,
  • Stephen M. F. Jamieson and
  • Christian G. Hartinger

11 August 2020

Thiones have been investigated as ligands in metal complexes with catalytic and biological activity. We report the synthesis, characterization, and biological evaluation of a series of MII/III complexes of the general formulae [MII(cym)(L)Cl]X (cym =...

  • Article
  • Open Access
6 Citations
2,242 Views
30 Pages

Novel C3-Methylene-Bridged Indole Derivatives with and without Substituents at N1: The Influence of Substituents on Their Hemolytic, Cytoprotective, and Antimicrobial Activity

  • Karolina Babijczuk,
  • Natalia Berdzik,
  • Damian Nowak,
  • Beata Warżajtis,
  • Urszula Rychlewska,
  • Justyna Starzyk,
  • Lucyna Mrówczyńska and
  • Beata Jasiewicz

Alkaloids are natural compounds useful as scaffolds for discovering new bioactive molecules. This study utilized alkaloid gramine to synthesize two groups of C3-substituted indole derivatives, which were either functionalized at N1 or not. The compou...

  • Article
  • Open Access
38 Citations
4,360 Views
27 Pages

Study on the Neuroprotective, Radical-Scavenging and MAO-B Inhibiting Properties of New Benzimidazole Arylhydrazones as Potential Multi-Target Drugs for the Treatment of Parkinson’s Disease

  • Neda Anastassova,
  • Denitsa Aluani,
  • Nadya Hristova-Avakumova,
  • Virginia Tzankova,
  • Magdalena Kondeva-Burdina,
  • Miroslav Rangelov,
  • Nadezhda Todorova and
  • Denitsa Yancheva

Oxidative stress is a key contributing factor in the complex degenerating cascade in Parkinson’s disease. The inhibition of MAO-B affords higher dopamine bioavailability and stops ROS formation. The incorporation of hydroxy and methoxy groups i...