Visible-light-mediated C2-amination of thiophenes by using DDQ as an organophotocatalyst
| Autor: | Aiwen Lei, Chunlan Song, Bowen Dou, Hong Yi, Yiying Li, Atul K. Singh |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010405 organic chemistry
Chemistry Metals and Alloys General Chemistry Electron transfer mediator 010402 general chemistry Photochemistry 01 natural sciences Catalysis 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Radical ion Materials Chemistry Ceramics and Composites Thiophene Photocatalysis Nitrite Amination Visible spectrum |
| Zdroj: | Chemical communications (Cambridge, England). 53(26) |
| ISSN: | 1364-548X |
| Popis: | In this work, a direct C–H activation of thiophenes was presented via an oxidation pathway under visible-light irradiation, in which the thiophene radical cation serves as the key intermediate. Various thiophenes and azoles could be transformed into the corresponding amination products well, and H2O was the only byproduct which is environmentally benign. Our results showed that tert-butyl nitrite (TBN) served as the electron transfer mediator and O2 as the terminal oxidant to regenerate the photocatalyst DDQ and revive the photocatalytic cycle. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|