22219-02-9Relevant articles and documents
Palladium Complex Immobilized on Magnetic Nanoparticles Modified with 2-Aminopyridine Ligand: A Novel and Efficient Recoverable Nanocatalyst for C–S and C–Se Coupling Reactions
Lu, Lu,Luo, Jia,Wang, Weiqi,Xu, Xiaoqing,Zhang, Jingzheng
, (2022/01/12)
A novel, versatile and efficient magnetically recoverable palladium nanocatalyst [Fe3O4@SiO2/2-aminopyridine-Pd(II)] was fabricated via the immobilization of palladium(II) complex on the surface of magnetic nanoparticles modified with 2-aminopyridine ligand. The structure of the as-fabricated Fe3O4@SiO2/2-aminopyridine-Pd(II) nanocomposite was characterized by a series of spectroscopic techniques including FT-IR, SEM, TEM, EDX, TGA, XRD, VSM and ICP-OES techniques. The Fe3O4@SiO2/2-aminopyridine-Pd(II) nanocomposite was utilized under mild and eco-friendly conditions in C–S and C–Se coupling reactions to afford a vast variety of diaryl sulfides and diaryl selenides with good to excellent yields. This heterogeneous palladium catalyst can be magnetically separated and reused for at least 7 consecutive trials without any reduction in activity. Graphical Abstract: [Figure not available: see fulltext.]
Zirconium oxide complex-functionalized MCM-41 nanostructure: An efficient and reusable mesoporous catalyst for oxidation of sulfides and oxidative coupling of thiols using hydrogen peroxide
Hajjami, Maryam,Shiri, Lotfi,Jahanbakhshi, Azar
, p. 668 - 673 (2015/09/28)
Zirconium oxide complex-functionalized mesoporous MCM-41 (Zr-oxide@MCM-41) as an efficient and reusable catalyst is reported for the oxidation of sulfides into sulfoxides using hydrogen peroxide (H2O2) as the oxidant, with short reaction times in good to excellent yields at room temperature under solvent-free conditions. Also, a simple and efficient method is reported for the oxidative coupling of thiols into corresponding disulfides in good to high yields using H2O2 as oxidant in the presence of Zr-oxide@MCM-41 as recoverable catalyst in ethanol at room temperature. A series of sulfides and thiols possessing functional groups was successfully converted into corresponding products. After completion of reactions the catalyst was easily separated with simple filtration from the reaction mixture and reused for several consecutive runs without significant loss of catalytic efficiency. The mesoporous catalyst was characterized using Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller surface area measurements, X-ray diffraction, transmission and scanning electron microscopies, energy-dispersive X-ray spectroscopy and thermogravimetric analysis.
THIOXANTHONE-4-CARBOXYLATES, THEIR PREPARATION METHODS, PHOTOINITIATOR COMPOSITIONS AND USES THEREOF
-
Paragraph 0029; 0030, (2013/05/23)
The present invention relates to thioxanthone-4-carboxylates, a method for the preparation of the compounds, photoinitiator compositions and use of them as photoinitiators. The compounds of the invention have a structure according to Formula ( I ) below:
