65130-25-8Relevant academic research and scientific papers
Ni nanoparticle-confined covalent organic polymer directed diaryl-selenides synthesis
Awasthi, Satish Kumar,Dixit, A. K.,Raghothama, S.,Yadav, Deepika
supporting information, p. 12266 - 12272 (2020/10/02)
The present work describes the preparation of a new covalent organic polymer (COP) and its application as a hetero support for diaryl selenides synthesis. A nitrogen rich COP (CGP) has been synthesized via SNAr reaction of cyanuric chloride with guanidinium hydrochloride. The successful confinement of COP with Ni nanoparticles through post-synthetic transformations (Ni?CGP) provides excellent catalytic activity for the transformation of aryl halides into diaryl selenides using elemental selenium powder. The synthetic transformations are well confirmed using various modern analytical and spectroscopic techniques which reveal high chemical and thermal durability. The N-rich framework of CGP fortifies the confinement of Ni NPs. Ni?CGP provides an efficient approach for diaryl selenides synthesis using a very cheap selenating reagent under water benign solvent conditions (DMSO?:?H2O) at room temperature with high reusability. Significantly, our work not only contributes the opportunity for developing economical and effective non-noble metal decorated COPs as heterogeneous catalysts, but also delivers an efficient approach to produce industrially important C-Se coupling products.
Selenium dioxide promoted dinitrogen extrusion/direct selenation of arylhydrazines and anilines
Yaqoob Bhat, Mohammad,Kumar, Atul,Naveed Ahmed, Qazi
supporting information, (2020/03/19)
A novel, efficient, economical strategy for the coupling and direct selenation of arylhydrazines to selenides using SeO2 has been developed. Our method employs SeO2 as the selenium source with hydrazines as coupling reactants to generate selenides via dinitrogen extrusion. This reagent also helped to generate ArSe substitued aniline derivatives via C–H functionalization reaction in good yields. The application of this method in gram scale was also carried out.
Organic selenium compound having antioxidant free radical activity and synthesis method and application thereof
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Paragraph 0026; 0029; 0031; 0032, (2018/09/21)
The invention relates to an organic selenium compound having antioxidant free radical activity. The organic selenium compound has the chemical name of 2-(4-(4-amino-phenyl)-seleno)-phenyl-1,2-benzoisoselazole-3(2H)-one; a synthesis method of the organic selenium compound is simple, a reaction condition is easy to control, and reaction raw materials are cheap and easy to obtain; the organic selenium compound has an obvious antioxidant free radical effect, shows a relatively good effect of scavenging hydrogen peroxide (H2O2) and peroxynitrite anion (ONOO-) free radicals and is expected to serveas an antioxidant free radical medicine; in addition, selenium is an essential trace element in a human body, and a selenophenyl benzoisoselazolone compound with the antioxidant free radical activityuses easily obtained raw materials and is easy to synthesize, so that an in-depth research and development value is achieved.
Palladium Nanoparticles Supported on Nitrogen-rich Containing Melamine-based Microporous Covalent Triazine Polymers as Efficient Heterogeneous Catalyst for C?Se Coupling Reactions
Sadhasivam, Velu,Balasaravanan, Rajendiran,Chithiraikumar, Chinnadurai,Siva, Ayyanar
, p. 3833 - 3844 (2018/07/30)
In the present work, microporous nitrogen containing covalent triazine polymers (CTPs) TATAM was synthesized from condensation of 4,4′4′′-(1,3,5-triazine-2,4,6-triyl) tribenzaldehyde (TATA) and melamine under solvothermal conditions to obtain nitrogen- rich triazine containing polymeric supported materials (TATAM). Further, palladium nanoparticles (Pd NPs) were supported on TATAM polymeric networks (Pd@TATAM). The synthesized Pd@TATAM CTPs material was thoroughly characterized by FT-IR, UV-DRS, solid state 13C-CPMAS, XPS, powder X-ray diffraction, TGA, SEM, TEM. In addition, the characterized Pd@TATAM CTPs were applied to check the catalytic application. The Pd@TATAM was shown to be an efficient and reusable heterogeneous solid catalyst for the formation of C?Se bond through coupling of aryl halide and elemental selenium, dimethyl sulfoxide as a solvent at 100 °C for about 6 h. Besides the absence of metal leaching for catalytic system, it is also observed that the catalyst can be reused for three consecutive cycles with a minimal decrease in its activity.
Microwave-assisted Cu2O-catalyzed one-pot synthesis of symmetrical diaryl selenides from elemental selenium
Zhang, Shaozhong,Karra, Kranthi,Heintz, Christina,Kleckler, Erica,Jin, Jin
supporting information, p. 4753 - 4755 (2013/08/23)
A novel and simple microwave-assisted one-pot protocol to prepare symmetrical diaryl selenides has been developed. A cross-coupling reaction between aryl iodide and elemental selenium takes place in the presence of KOH and a catalytic amount of Cu2O/NH2CH2CH 2NH2, leading to C-Se bond formation. The reactions are highly efficient with a reaction time of 1 h under microwave irradiation and yields from 50% to 90%.
Unexpected Disproportionation of 4,4'-Dialkylamino Substituted Diaryl Selenides and Tellurides
Andersson, Carl-Magnus,Berglund, Mats,Bergstroem-Heurlin, Lena,Engman, Lars,Hallberg, Anders,et al.
, p. 349 - 354 (2007/10/02)
The unsymmetrical diaryl selenides 1a and b disproportionate under acidic conditions, to produce the corresponding symmetrical analogues.Similarly, the aminosubstituted compounds 2b-d and 2k react with 2a to establish an equilibrium mixture with high sele
