通过通用方法合成了一系列含有第15组(N,P,As和Sb)和第16组(O,S,Se和Te)元素的苯并噻吩并[3,2- b ]苯并杂环。X射线分析表明,所有的四环杂并苯骨架都是平面的。与第15族-杂蒽相比,在第16族-杂蒽的激发能和它们的原子半径之间发现线性关系。进行密度泛函理论计算和电化学测量以了解结构与光学性质之间的关系。
Versatile telluracycle synthesis via the sequential electrophilic telluration of C(sp<sup>2</sup>)–Zn and C(sp<sup>2</sup>)–H bonds
作者:Bin Wu、Melvina Melvina、Xiangyang Wu、Edwin Kok Lee Yeow、Naohiko Yoshikai
DOI:10.1039/c7sc01162h
日期:——
We report herein a new approach for the synthesis of tellurium-bridged aromatic compounds based on the sequential electrophilic telluration of C(sp2)–Zn and C(sp2)–Hbonds with tellurium(IV) chlorides. A combination of transition metal-catalyzed (migratory) arylmetalation of alkynes and sequential telluration allows for the expedient construction of a library of functionalized benzo[b]tellurophenes
我们在此报告了一种新的合成碲桥接芳族化合物的新方法,该方法基于C(sp 2)-Zn和C(sp 2)-H键与碲(IV)氯化物的顺序亲电碲化。炔烃的过渡金属催化(迁移)芳基金属化和连续碲化相结合,可以方便地构建功能化的苯并[ b ]碲二苯酚文库。此外,可以容易地从相应的2-碘杂双联芳基合成各种杂芳基稠合的苯并二氮杂苯并与其他新颖的碲嵌入的多环芳族化合物。
Access to Valuable Chalcogen-Containing Biaryl Derivatives via Regioselective 2,2′-Dichalcogenation of 2-Bromobiaryls
The regioselective installation of chalcogen atoms into biaryl scaffolds is an important synthetic task due to the great value of chalcogen-containing biaryl derivatives in many fields. Here we undertake this task by developing a regioselective2,2′-dichalcogenation of 2-bromobiaryls with common chalcogen sources using an organolanthanum-mediated one-pot, two-step protocol. This strategy features high