期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 33, 页码 11854-11862出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201600800
关键词
green chemistry; iodine; nitrogen heterocycles; selenium; sulfur
资金
- CAPES
- CNPq
- CERSusChem GSK/FAPESP [2014/50249-8]
- INCT-Catelise
- FAPESC-Pronex
- TWAS
Highly efficient molecular-iodine-catalyzed chalcogenations (S and Se) of imidazo[1,2-a] pyridines were achieved by using diorganoyl dichalcogenides under solventf-ree conditions. This approach afforded the desired products that had been chalcogenated regioselectively at the C3 position in up to 96% yield by using DMSO as an oxidant, in the absence of a metal catalyst, and under an inert atmosphere. This mild, green approach allowed the preparation of different types of chalcogenated imidazo[1,2-a] pyridines with structural diversity. Furthermore, the current protocol was also extended to other N-heterocyclic cores.
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