Suzuki−Miyaura Cross-Coupling Reactions of Aryl Tellurides with Potassium Aryltrifluoroborate Salts
摘要:
Palladium(O)-catalyzed cross-coupling between potassium aryltrifluoroborate salts and aryl tellurides proceeds readily to afford the desired biaryls in good to excellent yield. The reaction seems to be unaffected by the presence of electron-withdrawing or electron-donating substituents in both the potassium aryltrifluoroborate salts and aryl tellurides partners. Biaryls containing a variety of functional groups can be prepared. A chemoselectivity study was also carried out using aryl tellurides bearing halogen atoms in the same compound. In addition, this new version of the Suzuki-Miyaura cross-coupling reaction was monitored by electrospray ionization mass spectrometry where some reaction intermediates were detected and analyzed.
Mild Reduction of Tellurium(IV) and Selenium(IV) Compounds by Sodium Ascorbate
作者:Lars Engman、Joachim Persson
DOI:10.1080/00397919308009800
日期:1993.2
Abstract Sodium ascorbate was found to mildly reduce organyltellurium trihalides to diorganyl ditellurides, organylselenium trihalides to diorganyl diselenides, diorganyltellurium dihalides and oxides to diorganyl tellurides and diorganylselenium dihalides and oxides to diorganyl selenides.
New aryltellurium trichlorides have been prepared. A method for synthesizing aryltellurium tribromides and triiodides based on the halogenolysis of the corresponding ditellurides is presented. Thiophenoxtellurine was obtained from o-thiophenoxyphenyltellurium trichloride.
Studies on nickel (II) and palladium (II) complexes with some tetraazamacrocycles containing tellurium
作者:Nitu Rathee、Krishan Verma
DOI:10.2298/jsc101211200r
日期:——
12-membered tellurium-contain- ing tetraazamacrocyclic complexes of divalent nickel and palladium by tem- plate condensation of diaryltellurium dichlorides, (aryl = p-hydroxyphenyl, 4- hydroxy-3-methyl-phenyl, p-methoxyphenyl) with 1,2-diaminoethane and 1,3- -diaminopropane in the presence of metal dichloride is reported. The resulting complexes were subjected to elemental analyses, magnetic measurements
Some Organotellurium(IV) Complexes of 1-Methyl-3-(p-tolylimino)indolin-2-one Schiff Base
作者:Manish Kumar、K.K. Verma、Sapana Garg
DOI:10.14233/ajchem.2021.23159
日期:——
the basis of spectroscopic data, it is evident that Schiffbase behaves as NO donor bidentate ligand via azomethine nitrogen atom and oxygen atom from carbonyl group for all the tellurium(IV) complexes. The results showed that all the organotellurium(IV) complexes possess distorted octahedral geometry. Geometry of the all organotellurium(IV) complexes was optimized and their theoretical quantum mechanical
Studies on 1,10-Phenanthroline Complexes of Some Hydroxyaryltellurium Trihalides
作者:K. K. Verma、Shashi Chhabra
DOI:10.1080/10426500802059760
日期:2008.11.7
10-phenanthroline complexes of p-hydroxyphenyl-and 3-methyl-4-hydroxyphenyltellurium trihalides (chlorides, bromides, and iodides) are reported. The resulting complexes have been subjected to elemental analyses, conductance and cryoscopic measurements, infra-red and proton magnetic resonance spectralstudies. Solution studies reveal the weak to 1:1 electrolyte type behavior of these complexes in solution