Transition-Metal-Free Synthesis of Unsymmetrical Diaryl Tellurides via SH2 Reaction of Aryl Radicals on Tellurium

Molecules

Akihiro Nomoto¹  Akiya Ogawa¹  Shintaro Kodama¹  Yuki Yamamoto¹  Fumiya Sato¹  Qiqi Chen¹ 

[1] Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka 599-8531, Japan;

关键词: unsymmetrical diaryl telluride;    transition-metal-free;    arylhydrazine;    S_H2 reaction;    aryl radical;   

DOI  :  10.3390/molecules27030809

来源: DOAJ

【 摘 要 】

Although diaryl tellurides are parent organotellurium compounds, their synthesis methods, especially for unsymmetrical ones, are limited. This may be due to the instability of diaryl tellurides and their synthesis intermediates under reaction conditions. Radical reactions are known to exhibit excellent functional group selectivity; therefore, we focused on a bimolecular homolytic substitution (S_H2) reaction between the aryl radical and diaryl ditelluride. Aryl radicals are generated from arylhydrazines in air and captured by diaryl ditellurides, resulting in a selective formation of unsymmetrical diaryl tellurides with high yields. The electronic effects of the substituents on both arylhydrazines and diaryl ditellurides on the S_H2 reaction of tellurium are also discussed in detail.

【 授权许可】

Unknown