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20 Results Found

  • Article
  • Open Access
13 Citations
2,739 Views
11 Pages

5 December 2020

Complexation of the 8,8′-bis(methylsulfanyl) derivatives of cobalt and iron bis(dicarbollides) [8,8′-(MeS)2-3,3′-M(1,2-C2B9H10)2]− (M = Co, Fe) with copper, silver, palladium and rhodium leads to the formation of the correspon...

  • Article
  • Open Access
4 Citations
2,290 Views
7 Pages

A Simple Way to Obtain a Decachloro Derivative of Cobalt Bis(dicarbollide)

  • Sergey A. Anufriev,
  • Marina Yu. Stogniy and
  • Igor B. Sivaev

1 February 2023

A simple synthetic way to obtain a decachloro derivative of cobalt bis(dicarbollide) has been found. The reaction of cesium salt of cobalt bis(dicarbollide) anion with aluminum chloride in chloroform under reflux conditions results in Cs[3,3′-C...

  • Article
  • Open Access
19 Citations
3,685 Views
12 Pages

Synthesis and Antibacterial Activity Studies of the Conjugates of Curcumin with closo-Dodecaborate and Cobalt Bis(Dicarbollide) Boron Clusters

  • Anna A. Druzina,
  • Natalia E. Grammatikova,
  • Olga B. Zhidkova,
  • Natalia A. Nekrasova,
  • Nadezhda V. Dudarova,
  • Irina D. Kosenko,
  • Mikhail A. Grin and
  • Vladimir I. Bregadze

A series of novel conjugates of cobalt bis(dicarbollide) and closo-dodecaborate with curcumin were synthesized by copper(I)-catalyzed azide-alkyne cycloaddition. These conjugates were tested for antibacterial activity. It was shown that all derivativ...

  • Review
  • Open Access
19 Citations
3,599 Views
67 Pages

Chemistry of Carbon-Substituted Derivatives of Cobalt Bis(dicarbollide)(1) Ion and Recent Progress in Boron Substitution

  • Lucia Pazderová,
  • Ece Zeynep Tüzün,
  • Dmytro Bavol,
  • Miroslava Litecká,
  • Lukáš Fojt and
  • Bohumír Grűner

7 October 2023

The cobalt bis(dicarbollide)(1−) anion (1−), [(1,2-C2B9H11)2-3,3′-Co(III)](1−), plays an increasingly important role in material science and medicine due to its high chemical stability, 3D shape, aromaticity, diamagnetic chara...

  • Article
  • Open Access
2 Citations
2,524 Views
10 Pages

Synthesis of Cobalt Bis(Dicarbollide)—Curcumin Conjugates for Potential Use in Boron Neutron Capture Therapy

  • Lyubov G. Dezhenkova,
  • Anna A. Druzina,
  • Yulia L. Volodina,
  • Nadezhda V. Dudarova,
  • Natalia A. Nekrasova,
  • Olga B. Zhidkova,
  • Mikhail A. Grin and
  • Vladimir I. Bregadze

21 July 2022

A series of novel cobalt bis(dicarbollide)—curcumin conjugates were synthesized. Two conjugates were obtained through the nucleophilic ring-opening reaction of the 1,4-dioxane and tetrahydropyran derivatives of cobalt bis(dicarbollide) with the...

  • Article
  • Open Access
12 Citations
3,331 Views
16 Pages

Synthesis of Boronated Amidines by Addition of Amines to Nitrilium Derivative of Cobalt Bis(Dicarbollide)

  • Ekaterina V. Bogdanova,
  • Marina Yu. Stogniy,
  • Kyrill Yu. Suponitsky,
  • Igor B. Sivaev and
  • Vladimir I. Bregadze

29 October 2021

A series of novel cobalt bis(dicarbollide) based amidines were synthesized by the nucleophilic addition of primary and secondary amines to highly activated B-N+≡C–R triple bond of the propionitrilium derivative [8-EtC≡N-3,3′-Co(1,2-C2B9H10)(1′,2′-C2B...

  • Article
  • Open Access
14 Citations
7,149 Views
13 Pages

New Fulvalenium Salts of Cobalt Bis(dicarbollide): Crystal Structures and Electrical Conductivities

  • Olga N. Kazheva,
  • Grigory G. Aleksandrov,
  • Andrey V. Kravchenko,
  • Vladimir A. Starodub,
  • Irina A. Lobanova,
  • Irina D. Kosenko,
  • Igor B. Sivaev,
  • Vladimir I. Bregadze,
  • Lev I. Buravov and
  • Oleg A. Dyachenko

6 January 2012

New radical cation salts (BEDT-TTF)[8,8',(7)-Cl2(Cl0.09)-3,3'-Co(1,2-C2B9H9.91)(1',2'-C2B9H10)] (1), (BEDT-TTF)[8,8'-Br0.75Cl1.25-3,3'-Co(1,2-C2B9H10)2] (2), and (BMDT-TTF)4[8,8'-Br1.16(OH)0.72-3,3'-Co(1,2-C2B9H10.06)2] (3) were synthesized, and thei...

  • Article
  • Open Access
2,125 Views
27 Pages

10 December 2024

The most commonly used homogeneous catalyst for fatty acid esterification is a corrosive sulphuric acid. However, this requires costly investment in non-corrosive equipment, presents a safety risk, is time consuming, and increases effluent generation...

  • Article
  • Open Access
2 Citations
2,450 Views
17 Pages

The exploitation of metallacarboranes’ potential in various fields of research and practical applications requires the availability of convenient and versatile methods for their functionalization with various functional moieties and/or linkers...

  • Article
  • Open Access
3 Citations
2,264 Views
14 Pages

New Boron Containing Acridines: Synthesis and Preliminary Biological Study

  • Anna A. Druzina,
  • Nadezhda V. Dudarova,
  • Ivan V. Ananyev,
  • Anastasia A. Antonets,
  • Dmitry N. Kaluzhny,
  • Alexey A. Nazarov,
  • Igor B. Sivaev and
  • Vladimir I. Bregadze

15 September 2023

The synthesis of the first conjugates of acridine with cobalt bis(dicarbollide) are reported. A novel 9-azido derivative of acridine was prepared through the reaction of 9-methoxyacridine with N3CH2CH2NH2, and its solid-state molecular structure was...

  • Communication
  • Open Access
4 Citations
3,364 Views
7 Pages

Highly Purified Conjugates of Natural Chlorin with Cobalt Bis(dicarbollide) Nanoclusters for PDT and BNCT Therapy of Cancer

  • Maria K. Fedotova,
  • Maksim N. Usachev,
  • Ekaterina V. Bogdanova,
  • Ekaterina Diachkova,
  • Yuriy Vasil’ev,
  • Vladimir I. Bregadze,
  • Andrey F. Mironov and
  • Mikhail A. Grin

To combine the neutron-capturing and photodynamic properties of boron nanoclusters and derivatives of natural chlorins, respectively, in one molecule, conjugate of chlorin e6 methyl ester with cyclen and dioxane and nitrile derivatives of cobalt bis(...

  • Article
  • Open Access
12 Citations
4,918 Views
11 Pages

Pharmacokinetics of Chlorin e6-Cobalt Bis(Dicarbollide) Conjugate in Balb/c Mice with Engrafted Carcinoma

  • Arthur B. Volovetsky,
  • Vladimir S. Sukhov,
  • Irina V. Balalaeva,
  • Varvara V. Dudenkova,
  • Natalia Yu. Shilyagina,
  • Аlexey V. Feofanov,
  • Anastasija V. Efremenko,
  • Mikhail A. Grin,
  • Andrey F. Mironov and
  • Anna V. Maslennikova
  • + 2 authors

28 November 2017

The necessary precondition for efficient boron neutron capture therapy (BNCT) is control over the content of isotope 10B in the tumor and normal tissues. In the case of boron-containing porphyrins, the fluorescent part of molecule can be used for qua...

  • Review
  • Open Access
74 Citations
10,987 Views
85 Pages

Silver and Copper Complexes with closo-Polyhedral Borane, Carborane and Metallacarborane Anions: Synthesis and X-ray Structure

  • Varvara V. Avdeeva,
  • Elena A. Malinina,
  • Igor B. Sivaev,
  • Vladimir I. Bregadze and
  • Nikolai T. Kuznetsov

Synthesis and structure of silver and copper salts and complexes with polyhedral boron hydride anions, including closo-decaborate [B10H10]2−, closo-dodecaborate [B12H12]2−, 1-carba-closo- decaborate [1-CB9H10]−, carba-closo-dodecaborate [CB11H12]−, a...

  • Article
  • Open Access
9 Citations
3,741 Views
14 Pages

Synthesis and Structure of Nido-Carboranyl Azide and Its “Click” Reactions

  • Anna A. Druzina,
  • Olga B. Zhidkova,
  • Nadezhda V. Dudarova,
  • Irina D. Kosenko,
  • Ivan V. Ananyev,
  • Sergey V. Timofeev and
  • Vladimir I. Bregadze

20 January 2021

Novel zwitter-ionic nido-carboranyl azide 9-N3(CH2)3Me2N-nido-7,8-C2B9H11 was prepared by the reaction of 9-Cl(CH2)3Me2N-nido-7,8-C2B9H11 with NaN3. The solid-state molecular structure of nido-carboranyl azide was determined by single-crystal X-ray d...

  • Article
  • Open Access
15 Citations
3,455 Views
14 Pages

Cobalt Bis-Dicarbollide Enhances Antibiotics Action towards Staphylococcus epidermidis Planktonic Growth Due to Cell Envelopes Disruption

  • Eva Vaňková,
  • Kristýna Lokočová,
  • Petra Kašparová,
  • Romana Hadravová,
  • Ivana Křížová,
  • Olga Maťátková,
  • Jan Masák and
  • Václav Šícha

26 April 2022

The emergence of antibiotic resistance in opportunistic pathogens represents a huge problem, the solution for which may be a treatment with a combination of multiple antimicrobial agents. Sodium salt of cobalt bis-dicarbollide (COSAN.Na) is one of th...

  • Article
  • Open Access
46 Citations
6,125 Views
21 Pages

Gold Nanoparticles as Boron Carriers for Boron Neutron Capture Therapy: Synthesis, Radiolabelling and In Vivo Evaluation

  • Krishna R. Pulagam,
  • Kiran B. Gona,
  • Vanessa Gómez-Vallejo,
  • Jan Meijer,
  • Carolin Zilberfain,
  • Irina Estrela-Lopis,
  • Zuriñe Baz,
  • Unai Cossío and
  • Jordi Llop

7 October 2019

Background: Boron Neutron Capture Therapy (BNCT) is a binary approach to cancer therapy that requires accumulation of boron atoms preferentially in tumour cells. This can be achieved by using nanoparticles as boron carriers and taking advantage of th...

  • Article
  • Open Access
13 Citations
4,116 Views
13 Pages

Dimethyloxonium and Methoxy Derivatives of nido-Carborane and Metal Complexes Thereof

  • Marina Yu. Stogniy,
  • Svetlana A. Erokhina,
  • Irina D. Kosenko,
  • Andrey A. Semioshkin and
  • Igor B. Sivaev

9-Dimethyloxonium, 10-dimethyloxonium, 9-methoxy and 10-methoxy derivatives of nido-carborane (9-Me2O-7,8-C2B9H11, 10-Me2O-7,8-C2B9H11, [9-MeO-7,8-C2B9H11]−, and [10-MeO-7,8-C2B9H11]−, respectively) were prepared by the reaction of the pa...

  • Communication
  • Open Access
11 Citations
2,856 Views
12 Pages

Synthesis, Crystal Structure, and Some Transformations of 9,12-Dichloro-ortho-Carborane

  • Sergey A. Anufriev,
  • Sergey V. Timofeev,
  • Olga B. Zhidkova,
  • Kyrill Yu. Suponitsky and
  • Igor B. Sivaev

2 September 2022

Reaction of ortho-carborane with anhydrous AlCl3 in chloroform results in a mixture of 9-chloro, 9,12-dichloro, and 8,9,12-trichloro derivatives with 9,12-dichloro-ortho-carborane being the main product. Molecular crystal structure of 9,12-dichloro-o...

  • Proceeding Paper
  • Open Access
1 Citations
2,083 Views
4 Pages

A Highly Sensitive Potentiometric Amphetamine Microsensor Based on All-Solid-State Membrane Using a New Ion-Par Complex, [3,3′-Co(1,2-closo-C2B9H11)2] C9H13NH+

  • J. Gallardo-Gonzalez,
  • A. Baraket,
  • S. Boudjaoui,
  • Y. Clément,
  • A. Alcácer,
  • A. Streklas,
  • F. Teixidor,
  • N. Zine,
  • J. Bausells and
  • A. Errachid

In the present work a highly sensitive ion-selective microelectrode for the detection of amphetamine is presented. For this purpose, a novel ion-par complex based on the metallocarborane, cobalt bis(dicarbollide) anion ([3,3′-Co(1,2-C2B9H11)2]−) coup...

  • Proceeding Paper
  • Open Access
1 Citations
2,676 Views
5 Pages

A Highly Sensitive Impedimetric Metamitron Microsensor Based on All-Solid-State Membrane Using a New Ion-Pair Complex, [3,3′-Co(1,2-closo-C2B9H11)2][C10H11ON4]+

  • Zakaria Ayroud,
  • Juan Gallardo-Gonzalez,
  • Abdoullatif Baraket,
  • Marie Hangouet,
  • Albert Alcácer,
  • Angelos Streklas,
  • Joan Bausells,
  • Abdelhamid Errachid and
  • Nadia Zine

11 December 2018

An all-solid-state impedimetric microsensor based on impedimetric measurements for detecting the herbicide metamitron (MM) is reported in the present work. For this purpose, a novel metamitron ionophore has been prepared. It was based on the isolatio...