Scalable electrochemical synthesis of diaryliodonium salts
作者:Mohamed Elsherbini、Wesley J. Moran
DOI:10.1039/d1ob00457c
日期:——
Cyclic and acyclic diaryliodonium are synthesised by anodic oxidation of iodobiaryls and iodoarene/arene mixtures, respectively, in a simple undivided electrolysis cell in MeCN–HFIP–TfOH without any added electrolyte salts. This atom efficient process does not require chemical oxidants and generates no chemical waste. More than 30 cyclic and acyclic diaryliodoniumsalts with different substitution
环状和非环状二芳基碘鎓分别通过碘联芳基和碘代芳烃/芳烃混合物的阳极氧化合成,在 MeCN-HFIP-TfOH 的简单未分隔电解池中,不添加任何电解质盐。这种原子效率的过程不需要化学氧化剂,也不会产生化学废物。以非常好的收率制备了 30 多种具有不同取代模式的环状和非环状二芳基碘鎓盐。将反应放大至 10 mmol 规模,在不到 3 小时内得到超过 4 克的二苯并[ b , d ]碘-5-鎓三氟甲磺酸盐 (>95%)。大规模实验的溶剂混合物被回收(>97%)并循环多次,收率没有显着降低。
Conversion of 2-Iodobiaryls into 2,2′-Diiodobiaryls via Oxidation-Iodination Sequences: A Versatile Route to Ladder-Type Heterofluorenes
作者:Bin Wu、Naohiko Yoshikai
DOI:10.1002/anie.201503134
日期:2015.7.20
heterofluorenes and other extended π‐conjugated systems, their preparation still remains nontrivial when structural diversity of the biaryl backbone is required. Herein, we report a convenient method for the preparation of various 2,2′‐diiodobiaryls from 2‐iodobiaryls via cyclic diaryliodonium intermediates. An iodinative ring‐opening of the diaryliodonium salts, mediated by a copper/diamine catalyst
A synthesis of tellurium-embedded π-extended aromatics from tellurium powder and readily available cyclic diaryliodonium salts has been developed. The versatility of this method has been demonstrated by the synthesis of various functionalized dibenzotellurophenes (DBTe's), a ladder-type π-system, and a heterosumanene. These compounds demonstrated good air/moisture stability and high thermal stability
Transition-Metal-Free Diarylannulated Sulfide and Selenide Construction via Radical/Anion-Mediated Sulfur–Iodine and Selenium–Iodine Exchange
作者:Ming Wang、Qiaoling Fan、Xuefeng Jiang
DOI:10.1021/acs.orglett.6b03078
日期:2016.11.4
selenide construction through S–I and Se–I exchange without transition metal assistance. Elementalsulfur and selenium served as the chalcogen source. Diarylannulated sulfides were systematically achieved from a five- to eight-membered ring. A trisulfurradicalanion was demonstrated as the initiator for this radical process via electron paramagnetic resonance (EPR) study. OFET molecules [1]benzothieno[3
在没有过渡金属协助的情况下,通过S–I和Se–I交换,可以轻松,直接地建立二芳基环化硫化物和硒化物的制备方法。元素硫和硒用作硫族元素来源。从五元至八元环系统地制得二芳基环化的硫化物。通过电子顺磁共振(EPR)研究,三硫自由基阴离子被证明是该自由基过程的引发剂。高效地建立了OFET分子[1]苯并噻吩并[3,2- b ] [1]苯并噻吩(BTBT)和[1]苯并噻吩并[3,2- b ] [1]苯并硒吩(BTBS)。