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Chem. Commun., 2009, 5236 - 5238, DOI: 10.1039/b912093a

Intramolecular cross-coupling of gem-dibromoolefins: a mild approach to 2-bromo benzofused heterocycles

Stephen G. Newman, Valentina Aureggi, Christopher S. Bryan and Mark Lautens

Highly useful halogenated benzofurans and benzothiophenes are prepared from readily available gem-dibromoolefins using a mild, ligand-free copper catalyzed cross-coupling procedure.

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