A general procedure for the synthesis of methylthio-, methylseleno- and methyltelluro-substituted aromatic compounds
作者:Lars Engman、Jonas S.E. Hellberg
DOI:10.1016/0022-328x(85)80366-1
日期:1985.12
A one-pot procedure is described which allows the facile introduction of one or two methylchalcogeno groups into a variety of monobromo or dibromo aromatics. The bromo compounds were converted to their corresponding lithio derivatives by treatment with t-butyllithium in tetrahydrofuran at −78°C, and these derivatives were then treated, at ambient temperature with elemental sulfur, selenium, or tellurium
The reaction of diorganyl diselenides and ditellurides with organic mercury compounds. A convinient method for the synthesis of unsymmetrical organic selenides and tellurides
作者:Yoshiyuki Okamoto、Takefumi Yano
DOI:10.1016/s0022-328x(00)87494-x
日期:1971.5
The reaction of diphenyl diselenide with di-n-butylmercury in dioxane at refluxing temperature gave n-butyl phenyl selenide (80% yield) and metallic mercury. When the reaction was carried out at room temperature, n-butyl phenyl selenide and bis(phenylseleno)mercury were obtained. This reaction furnished a convinient method for the preparation of several organic selenides as well as tellurides.
Substituent effects and stereochemistry in125Te NMR spectroscopy. Diorganyltellurium dihalides and some tellurides and ditellurides
作者:Helmut Duddeck、Armin Biallaβ
DOI:10.1002/mrc.1260320509
日期:1994.4
125Te, 19F and 13C NMR data for 33 compounds containing tellurium substituents are presented. The 125Te chemical shifts in (PhTeCl2)R compounds are between δ = 878 and 1023; in corresponding (PhTeF2)R compounds they are 220 to 360 ppm larger. Effects of substituents and conformational interconversions (dynamic 125Te NMR) are discussed. Several diastereomers were identified in (PhTeCl2)R derivatives
Evaluation of phenylorganotellurium compounds as radical precursors in dialkylzinc-mediated radical addition to CN double bonds
作者:Fabien Cougnon、Laurence Feray、Samantha Bazin、Michèle P. Bertrand
DOI:10.1016/j.tet.2007.09.014
日期:2007.11
Diethylzinc-mediated radical addition to CNbonds was investigated in the presence of phenylorganotellurium compounds as radical precursors. As group transfer agents, secondary alkyl phenyl tellurides were shown to be about twice as reactive as the corresponding alkyl iodides towards ethyl radical. Their use was proven to be advantageous regarding both chemoselectivity and yield. The replacement of
作者:Kurt J. Irgolic、P.J. Busse、R.A. Grigsby、M.R. Smith
DOI:10.1016/s0022-328x(00)91458-x
日期:1975.4
tellurides, C6H5TeR (R = CH3, C2H5, C3H7, i-C3H7, C4H9, C14H29), as light sensitive yellow oils in yields ranging from 62 to 81%. The tetradecyl derivative could not be purified by distillation and was, therefore, converted to the diiodide. The heat sensitive alkylphenyltellurium dihalides, RC6H5TeX2, were obtained by treating the tellurides with iodine (R = CH3, C2H5, C3H7, i-C3H7, C4H9, C14H29) or bromine
由四氢呋喃溶液中的二苯基二碲化物和锂金属生成的苯基碲化碲用烷基卤化物处理,生成烷基苯基碲化物C 6 H 5 TeR(R = CH 3,C 2 H 5,C 3 H 7,iC 3 H 7, C 4 H 9,C 14 H 29),为光敏黄色油,产率为62%至81%。十四烷基衍生物不能通过蒸馏纯化,因此被转化为二碘化物。热敏烷基苯基碲二卤化物,RC 6 H 5的TeX 2,通过用碘(R = CH处理碲化物获得3,C 2 H ^ 5,C 3 H ^ 7,IC 3 ħ 7,C 4 H ^ 9,C 14 H ^ 29)或溴(R = C 4 H ^ 9)。报道了碲化物的紫外可见和NMR光谱数据。