ChemInform Abstract: Copper-Catalyzed Tandem C-C/C-O Bond-Forming Reactions of ortho-Halo-β-chlorostyrenes with Ketones: Synthesis of 4-Trifluoromethylbenzoxepines.

The annulation reaction involves the direct α-alkenylation of ketones (II) and a subsequent intramolecular O-arylation process affording title compounds (III) in moderate to good yields. [ABSTRACT FROM AUTHOR]