856074-00-5Relevant academic research and scientific papers
Solvent selective phenyl selenylation and phenyl tellurylation of aryl boronic acids catalyzed by Cu(II) grafted functionalized polystyrene
Roy, Susmita,Chatterjee, Tanmay,Islam, Sk. Manirul
, p. 779 - 783 (2015)
A solvent-selective methodology for the phenyl selenylation and phenyl tellurylation of aryl boronic acids has been developed for the first time using a polymer supported Cu(II) catalyst. The catalyst was synthesized by anchoring Cu(OAc)2 onto a functionalized polystyrene with pyridine thiosemicarbazone ligand. It was then characterized properly by SEM, EDAX, FT-IR, TGA, and EPR experiments. The catalyst smoothly catalyzes phenyl selenylation of aryl boronic acids in water and phenyl tellurylation of aryl boronic acids in PEG-600, selectively. Thus a wide variety of unsymmetrical organodiaryl or aryl-heteroaryl selenides and tellurides have been synthesized by this protocol. The catalyst was recycled up to six runs without any appreciable loss of catalytic activity.
Trichloroisocyanuric Acid-Promoted Synthesis of Arylselenides and Aryltellurides from Diorganyl Dichalcogenides and Arylboronic Acids at Ambient Temperature
Sun, Nan,Zheng, Kai,Sun, Pengyuan,Chen, Yang,Jin, Liqun,Hu, Baoxiang,Shen, Zhenlu,Hu, Xinquan
, p. 3577 - 3584 (2021/06/15)
A transition-metal-free method for the synthesis of arylselenides and aryltellurides has been established based on the oxidative cross-coupling between diorganyl dichalcogenides and aryl boronic acids. With trichloroisocyanuric acid as an oxidant, the reaction proceeded smoothly to afford the desired products in 45–97% yields at ambient temperature. Three reaction reagents used in this method are stoichiometric and the oxidation by-product isocyanuric acid can be easily isolated and recovered. Besides of arylboronic acids, aryl trifluoroborates and aryl trihydroxyborates salts are also able to perform this transformation. (Figure presented.).
Method for preparing asymmetric organic selenium ether compounds through metal-free chemical oxidation method (by machine translation)
-
Paragraph 0059-0063, (2020/12/09)
The method is mild in reaction condition, convenient to operate, high in 1 reaction condition, convenient 2 to operate, high in safety, wide in substrate range, high 2 - 8h in yield, particularly suitable for reaction of various poor 3 electric and sterically hindered arylboronic acid and diselenoxy ether, and capable of finishing most of the reaction 4h. (by machine translation)
Magnetically separable CuFe2O4 nanoparticle catalyzed CSe cross coupling in reusable PEG medium
Harsha Vardhan Reddy,Satish,Ramesh,Karnakar,Nageswar
experimental part, p. 585 - 587 (2012/07/30)
A simple and efficient procedure for the synthesis of unsymmetrical diaryl selenides has been developed by magnetically separable CuFe2O 4 nanoparticle catalyzed reactions of organoboranes with PhSeBr in recyclable PEG-400 medium at 80 °C and Cs2CO3 as base. Using this protocol, a variety of unsymmetrical selenides were obtained in good to excellent yields. The copper ferrite nanoparticles were magnetically separated, recycled, and reused up to four cycles.
