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)。
Oxygenation of cyclic diphenyl iodoniums (CDPIs) with varied medium‐ring sizes has been fully investigated. This practical copper‐catalyzed tandem reaction of CDPIs with water as the oxygensource enables the construction of derivatised dibenzofurans and xanthenes at moderate to good yields. Moreover, structurally important xanthones are also successfully accessed under the oxygenation conditions with
Broad activity of diphenyleneiodonium analogues against Mycobacterium tuberculosis, malaria parasites and bacterial pathogens
作者:Nghi Nguyen、Danny W. Wilson、Gayathri Nagalingam、James A. Triccas、Elena K. Schneider、Jian Li、Tony Velkov、Jonathan Baell
DOI:10.1016/j.ejmech.2017.10.010
日期:2018.3
evaluated primarily for in vitro efficacy against Gram-positive and Gram-negative bacteria, commonly responsible for nosocomial and community acquired infections. In addition, we also assessed the activity of these compounds againstMycobacteriumtuberculosis (Tuberculosis) and Plasmodium spp. (Malaria). This led to the discovery of highly potent compounds active against bacterial pathogens and malaria parasites
Using an easily prepared triethylammonium N‐benzyldithiocarbamate salt as a sulfur source, a dual C−S functionalization of cyclic diaryliodoniums to form tricyclic thioheterocycles is realized. Our method uses the readily available copper sulfate to accelerate the chemical transformation under mild conditions. A broad range of cyclic diaryliodoniums with a ring size from 5‐ to 7‐membered can be employed