Abstract
A convenient, large-scale synthesis of a dibenz[b,e]oxepinone derivative is described. The dibenz[b, e]oxepinone ring system is constructed using an iron chloride catalyzed intramolecular Friedel-Crafts cyclization of an appropriate phenoxymethylbenzoic acid chloride in toluene, reagents and conditions that are economically and environmentally compatible with large-scale preparation. † Present Address: Department of Medicinal Chemistry, Merck Research Laboratories, West Point, PA 19486 † Present Address: American Cyanamid Company, Agricultural Products Research Division, P.O. Box 400, Princeton, NJ 08543 - 0400
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