Diverse Reactions of Thiophenes, Selenophenes, and Tellurophenes with Strongly Oxidizing I(III) PhI(L)<sub>2</sub> Reagents
作者:Sathsara Egalahewa、Mohammad Albayer、Antonino Aprile、Jason L. Dutton
DOI:10.1021/acs.inorgchem.6b02386
日期:2017.2.6
of aromatic group 16 thiophene, selenophene, and tellurophene rings with the I(III) oxidants PhI(OAc)(OTf) and [PhI(Pyr)2][OTf]2 (Pyr = pyridine). In all reactions, oxidative processes take place, with generation of PhI as the reduction product. However, with the exception of tellurophene with PhI(OAc)(OTf), +4 oxidation state complexes are not observed, but rather a variety of other processes occur
我们报告了芳香族16噻吩,硒烯和碲烯环与I(III)氧化剂PhI(OAc)(OTf)和[PhI(Pyr)2 ] [OTf] 2(Pyr =吡啶)的反应结果。在所有反应中,都会发生氧化过程,并生成PhI作为还原产物。但是,除带有PhI(OAc)(OTf)的碲二苯醚外,未观察到+4氧化态络合物,而是发生了许多其他过程。通常,在5元环上可使用CH单元的情况下,-IPh或吡啶在环上发生亲电芳族取代反应。当所有位置均被封闭时,与PhI(OAc)(OTf)的反应会生成乙酸酐和三氟甲酸酐作为可识别的氧化副产物,而[PhI(Pyr)2 ] [OTf]2给出吡啶亲电子芳族取代到外围环上。定性的机理研究表明,吡啶以实质上的方式充当亲电子试剂需要存在可氧化的杂原子。