Gold-Catalyzed Intramolecular Regioselective 7<i>-exo-dig</i> Cyclization To Access 3‑Methylene-3,4-dihydrobenzo[<i>b</i>]oxepinones
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An efficient gold-catalyzed synthesis of substituted 3-methylene-3,4-dihydrobenzo[b]oxepinones from ortho-O-propargyl substituted aryl enaminones has been achieved. In this transformation a new C–C bond formation occurred regioselectively via 7-exo-dig cyclization. Benzooxepinone derivatives were obtained in good to excellent yields in a one-pot synthesis at ambient temperature.
创建时间:
2016-12-21



