Dong Z, Li Z, Hu P, Guo T, Zhang P, Zhu C. Copper-Catalyzed Tandem Cyclization/Chalcogenation with Elemental S
8/Se: Concise Synthesis of 3-(β-Hydroxychalcogen)benzofurans.
J Org Chem 2024;
89:9641-9646. [PMID:
38910296 DOI:
10.1021/acs.joc.4c00077]
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Abstract
A novel copper-catalyzed cyclization/chalcogenation of o-alkynylphenols with epoxides and elemental S8/Se was developed for the synthesis of a 3-chalcogen-benzofuran architecture in a domino process with no intermediate isolation or purification. Various sensitive functional groups were compatible at room temperature and furnished chalcogenation derivatives in moderate to good yields.
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