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Silver-Mediated Regioselective Pyridyl C(sp2)-H Chalcogenation
Junlong Li1, Qianli Zhao1, Zhongrui Zhang1
1Antibiotics Innovation and Resistance Control Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu610106, People's Republic of China.
This study introduces a new method for regioselective chalcogenation of nitrogen-containing heterocycles like pyridines. The reaction is efficient, versatile, and suitable for late-stage drug functionalization.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
Background:
- Nitrogen-containing heterocycles are crucial scaffolds in medicinal chemistry.
- Developing efficient methods for their functionalization is essential for drug discovery.
Purpose of the Study:
- To develop a highly regioselective chalcogenation method for pyridines, pyrimidines, and isoquinolines.
- To enable late-stage functionalization of drug molecules.
Main Methods:
- Utilized readily available dichalcogenides for the transformation.
- Employed simple reaction conditions.
- Investigated preliminary mechanistic pathways.
Main Results:
- Achieved highly regioselective chalcogenation of pyridines, pyrimidines, and isoquinolines.
- Demonstrated tolerance to a wide range of functional groups.
- Indicated a likely single-electron transfer (SET) pathway.
Conclusions:
- The developed method offers a versatile approach for synthesizing functionalized nitrogen heterocycles.
- The reaction's applicability to late-stage functionalization facilitates drug discovery and development.
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