1073183-74-0Relevant articles and documents
Rhodium(III)-Catalyzed C-H/N-H Alkyne Annulation of Nonsymmetric 2-Aryl (Benz)imidazole Derivatives: Photophysical and Mechanistic Insights
Dias, Gleiston G.,Paz, Esther R. S.,Kadooca, Juliana Y.,Sabino, Ad?o A.,Cury, Luiz A.,Torikai, Kohei,De Simone, Carlos A.,Fantuzzi, Felipe,Da Silva Júnior, Eufranio N.
, p. 264 - 278 (2021)
Rhodium(III) catalysis enabled C-H/N-H alkyne annulation of nonsymmetric imidazole derivatives. This study encompasses the synthesis of imidazoles from a naturally occurring quinoidal compound and their use for the preparation of rigid π-extended imidazole derivatives with outstanding fluorescence. Our study also brings to light the photophysical aspects and the mechanism of the reaction studied via computational calculations. This method provided an efficient and versatile tool for the synthesis of fluorescent compounds with a wide range of chemical and biological applications.
An imidazolium ionic compound-supported palladium complex as an efficient catalyst for Suzuki-Miyaura reactions in aqueous media
Zong, Yingxiao,Wang, Junke,He, Yubi,Yue, Guoren,Wang, Xicun,Pan, Yi
, p. 89621 - 89626 (2016)
A water soluble and efficient ionic compound-supported palladium complex was prepared. The structure and composition of the complex was characterized by FT-IR, NMR, ICP-OES and mass spectrometry. The complex exhibits high catalytic activity for Suzuki-Miyaura reactions in aqueous media. Moreover, the catalyst shows outstanding stability and reusability, and it can be recovered simply and effectively and reused six times without much activity decrease.
Ectonucleotidase Inhibitory and Redox Activity of Imidazole-Based Organic Salts and Ionic Liquids
Boldescu, Veaceslav,Sucman, Natalia,Hassan, Sidra,Iqbal, Jamshed,Neamtu, Mariana,Lecka, Joanna,Sévigny, Jean,Prodius, Denis,Macaev, Fliur
, p. 2297 - 2304 (2018)
Cytotoxicity against cancer and normal cells, inhibition of ectonucleotidase, and redox properties of a new group of imidazole-based organic salts and ionic liquids were studied. The tetrachloroferrate salt of a 1-methylimidazole derivative of salicylic aldehyde had most prominent inhibitory activity against ectonucleotidase as well as a higher cytotoxicity against HeLa cells and lower cytotoxicity against BHK-21 cells than the reference compound carboplatin. The studied compounds exhibited a moderate level of antioxidant activity with better results for the salicylic aldehyde derivatives than for spiropyrans. Moreover, these compounds did not generate singlet oxygen.
Six-coordinated vanadium(IV) complexes with tridentate task-specific ionic liquid Schiff base ligands: Synthesis, characterization and effect of ionic nature on catalytic activity
Talouki, Somayeh Azizi,Grivani, Gholamhossein,Khalaji, Aliakbar Dehno
, (2018)
By reaction of 5-(chloromethyl)salicylaldehyde with triphenylphosphine and N-methylimidazole in two separate reactions, salicylaldehydetriphenylphosphonium chloride (S2) and salicylaldehydemethylimidazolinium chloride (S3) were prepared. Reaction of 2-(aminomethyl)pyridine with these aldehydes resulted in the task-specific ionic liquid Schiff base ligands L1 and L2, respectively. Then six-coordinated vanadium(IV) Schiff base complexes of VO(acac)L1–4 were synthesized by reactions of these tridentate Schiff base ligands and VO(acac)2 in 1:1 stoichiometry. The aldehydes, ligands and VO(acac)L1–4 complexes were characterized using infrared, 1H NMR, 13C NMR, 31P NMR, UV–visible and mass spectroscopies, as well as elemental analysis. Paramagnetic property of the complexes was also studied using magnetic susceptibility measurements. The complexes were used as catalysts in epoxidation of cyclooctene and oxidation of methylphenyl sulfide and the reaction parameters were optimized. The effect of the ionic nature of the complexes was investigated in these oxidation reactions. The catalytic activity of the complexes could be varied by changing the ionic (cationic or anionic) character of VO(acac)L1–4 catalysts in which counter anion variation showed a greater effect than cationic moiety variation.
