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MDPIMDPI

4 Results Found

  • Article
  • Open Access
6 Citations
3,583 Views
18 Pages
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NbCl5-Mg Reagent System in Regio- and Stereoselective Synthesis of (2Z)-Alkenylamines and (3Z)-Alkenylols from Substituted 2-Alkynylamines and 3-Alkynylols

  • Rita N. Kadikova,
  • Azat M. Gabdullin,
  • Oleg S. Mozgovoj,
  • Ilfir R. Ramazanov and
  • Usein M. Dzhemilev
Molecules2021, 26(12), 3722;https://doi.org/10.3390/molecules26123722

18 June 2021

The reduction of N,N-disubstituted 2-alkynylamines and substituted 3-alkynylols using the NbCl5–Mg reagent system affords the corresponding dideuterated (2Z)-alkenylamine and (3Z)-alkenylol derivatives in high yields in a regio- and stereoselective m...

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  • Article
  • Open Access
15 Citations
7,470 Views
5 Pages
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Lewis Acid Catalysis of the Diels–Alder Reaction Using Niobium and Tantalum Chlorides in the Presence of Coordinating Ligands

  • Joshua Howarth and
  • Kevin Gillespie
Molecules2000, 5(8), 993-997;https://doi.org/10.3390/50800993

5 August 2000

The Jacobsen and pybox type ligands effect chiral induction in the presence of niobium(V) chloride and tantalum(V) chloride in the Lewis acid catalysed Diels–Alder reaction.

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  • Proceeding Paper
  • Open Access
1,303 Views
4 Pages
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Transformation of Dialkyl-Substituted Alkynes under the Action of the TaCl5-Mg and NbCl5-Mg Reagent System

  • Azat M. Gabdullin,
  • Oleg S. Mozgovoj,
  • Rita N. Kadikova,
  • Ilfir R. Ramazanov and
  • Usein M. Dzhemilev
Chem. Proc.2022, 8(1), 52;https://doi.org/10.3390/ecsoc-25-11680

13 November 2021

A regioselective method for the preparation of p-tolyl-substituted alkanes is presented based on the reaction of dialkyl-substituted alkynes with four equivalents of TaCl5 or NbCl5 in the presence of stoichiometric amounts of metallic magnesium in to...

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  • Feature Paper
  • Article
  • Open Access
3 Citations
1,329 Views
20 Pages
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Photocatalysis by Mixed Oxides Containing Niobium, Vanadium, Silica, or Tin

  • Agnieszka Feliczak-Guzik,
  • Agata Wawrzyńczak and
  • Izabela Nowak
Catalysts2025, 15(2), 118;https://doi.org/10.3390/catal15020118

26 January 2025

Nb-Sn, V-Sn mixed-metal oxides and Nb-Si, V-Si metal oxide–silicas were successfully synthesized through a “soft” templating method, in which appropriate amounts of metal salts (either niobium(V) chloride, or vanadium(IV) oxide sulf...

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