期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2014, 期 18, 页码 3831-3840出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201402095
关键词
Heterocycles; Selenophenes; Selenium; Bromination; Cyclization
资金
- Latvian Council of Science [447/2012]
A novel approach for the cyclization of arylalkynes with selenium(IV) bromide prepared in situ has been elaborated. The use of an alkene additive as a bromine scavenger provides a convenient synthetic pathway for the synthesis of a wide variety of 3-bromobenzo[b]selenophenes. Reactions can be performed open to air without the use of moisture-sensitive reagents, anhydrous solvents, or an inert atmosphere. Selenobromination of ethynylthiophenes has been applied for the preparation of selenopheno[3,2-b]- and selenopheno[2,3-b]thiophenes. The molecular structures of representative derivatives have been confirmed by X-ray crystallographic analysis.
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