α-Telluration of 2-acetylthiophene: Electronic influence of the heteroaromatic moiety on solid state structures
作者:Ashok K.S. Chauhan、Poornima Singh、Ramesh C. Srivastava、Ray J. Butcher、Andrew Duthie
DOI:10.1016/j.jorganchem.2010.07.025
日期:2010.11
aryltellurium(II) bromide provides direct routes to (2-thiophenoylmethyl)tellurium(IV) dibromides, (2-(C4H3S)COCH2)2TeBr2 (1b) and 2-(C4H3S)COCH2ArTeBr2 (Ar = 1-C10H7, Npl, 2b; 2,4,6-Me3C6H2, Mes, 3b). The chloro analogues, 2-(C4H3S)COCH2ArTeCl2 (Ar = Npl, 2a; Mes, 3a) were prepared by the condensation reaction of the parent methylketone with NplTeCl3 or MesTeCl3. Metathesis of these products with an alkali iodide
在元素碲和溴化芳基碲(II)上进行室温氧化α-溴-2-乙酰基噻吩的氧化提供了直接途径制得(2-(C 4 H 3 S)COCH 2)2(2-噻吩酰基甲基)碲(IV)TeBr 2(1b)和2-(C 4 H 3 S)COCH 2 ArTeBr 2(Ar = 1-C 10 H 7,Npl,2b ; 2,4,6-Me 3 C 6 H 2,Mes,3b) 。氯代类似物2-(C 4 H 3 S)COCH 2通过母体甲基酮与NplTeCl 3或MesTeCl 3的缩合反应制备ArTeCl 2(Ar = Npl,2a ; Mes,3a)。这些产物与碱性碘化物的复分解反应提供了碘类似物1c,2c和3c。这些diorganotellurium二卤化物与亚硫酸氢到diorganotellurides减少1 - 3,其可以容易地与dihalogens到所需diorganotellurium(IV)二卤化物被氧化。化合物1是与C