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

ABSTRACT: 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 (SH2) 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 SH2 reaction of tellurium are also discussed in detail.

SUBMITTER: Yamamoto Y

PROVIDER: S-EPMC8839872 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature

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Transition-Metal-Free Synthesis of Unsymmetrical Diaryl Tellurides via S<sub>H</sub>2 Reaction of Aryl Radicals on Tellurium.

Yamamoto Yuki Y Sato Fumiya F Chen Qiqi Q Kodama Shintaro S Nomoto Akihiro A Ogawa Akiya A

Molecules (Basel, Switzerland) 20220126 3

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<sub>H</sub>2) reaction between the aryl radical and diaryl ditelluride. Aryl radicals are generated f ...[more]

PMID: 35164075

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