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
Synthesis of Functionalized Dibenzothiophenes - An Efficient Three-Step Approach Based on Pd-Catalyzed C-C and C-S Bond Formations
作者:Tue Heesgaard Jepsen、Mogens Larsen、Morten Jørgensen、Katarzyna A. Solanko、Andrew D. Bond、Anders Kadziola、Mogens Brøndsted Nielsen
DOI:10.1002/ejoc.201001393
日期:2011.1
A novel and efficientthree-step protocol for synthesizing functionalizeddibenzothiophenes (DBTs) from common starting materials and by using palladium-catalyzed carbon-carbon and carbon-sulfur bondformations is presented. The reaction conditions offer significantly improved functional-group tolerance and regioselectivity as compared to previously reported methods.
Palladium(II)-Catalyzed Synthesis of Dibenzothiophenes from 2-Biphenylyl Disulfides by C−H Functionalization
作者:Kota Nishino、Yohei Ogiwara、Norio Sakai
DOI:10.1002/chem.201802475
日期:2018.8.1
The palladium‐catalyzed oxidative preparation of dibenzothiophene derivatives from 2‐biphenylyl disulfides by C−Hfunctionalization is described herein. This procedure shows a high tolerance toward various functional groups and does not require the further addition of a metal oxidant, a base, or a ligand. Also, the present method was applied to the facile preparation of dibenzoselenophene.
reactions to produce polycyclic (hetero)aromatichydrocarbons. Herein, we report that dibenziodolium triflates smoothly react with potassium thioacetate in the presence of CuCl2 in THF or DMSO at 100–110 °C to afford the corresponding dibenzothiophenes in good-to-high yields. The coupling reaction tolerates reactive functional groups such as chloro and cyano and serves as a facile and reliable method