《Hantzsch Ester as a Visible-Light Photoredox Catalyst for Transition-Metal-Free Coupling of Aryl halides and Arylsulfinates》 was published in Chemistry – A European Journal in 2020. These research results belong to Zhu, Da-Liang; Wu, Qi; Li, Hai-Yan; Li, Hong-Xi; Lang, Jian-Ping. Quality Control of 2-Bromobenzonitrile The article mentions the following:
Di-Et 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (HEH) was utilized as a visible-light photoredox catalyst for the cross coupling of aryl halides and aryl sulfinates without transition metal, sacrificial agent and mediator. This method was compatible with various functional groups and provided diaryl sulfones in good to high yields. Mechanistic studies indicated that this reaction underwent the stepwise light irradiation of HE-, single electron transfer (SET) in donor-acceptor complex (DAC) from *HE- to aryl halide, trapping of aryl radical with sulfinate and SET oxidation of sulfone radical anion by HE. to sulfone by the DAC method. In the part of experimental materials, we found many familiar compounds, such as 2-Bromobenzonitrile(cas: 2042-37-7Quality Control of 2-Bromobenzonitrile)
2-Bromobenzonitrile(cas: 2042-37-7) is a precursor to the quinazolinones, a class of drugs used to treat autoimmune diseases and coronary heart disease. This substrate molecule undergoes a palladium-catalyzed coupling reaction to form an aromatic ring. The light emission from this reaction can be seen in the reaction solution.Quality Control of 2-Bromobenzonitrile
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts