期刊
GREEN CHEMISTRY LETTERS AND REVIEWS
卷 15, 期 2, 页码 372-381出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17518253.2022.2065891
关键词
Organochalcogen; thieno[2; 3-b]pyridines; green chemistry; visible light-promoted reaction; heterocycles; selenocyclization
资金
- CNPq
A simple and environment-friendly protocol was described for the synthesis of 2-aryl-(3-organoselanyl)thieno[2,3-b]pyridines, using diorganyl diselenides as selenium source and visible light-promoted selenocyclization reaction.
We describe a simple and environment-friendly visible light-promoted protocol to access 2-aryl-(3-organoselanyl)thieno[2,3-b]pyridines, through the selenocyclization of 3-(arylethynyl)-2-(alkylthio)pyridines in the presence of diorganyl diselenides as selenium source. The Se-based reactive species were generated in situ by the homolytic Se-Se bond cleavage using blue LED in an O-2 atmosphere at room temperature. The protocol was suitable for a wide range of substrates bearing different substituents, allowing the synthesis of twenty-one thieno[2,3-b]pyridines in good to excellent yields (57-99%).
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