Pd-Catalyzed allylic C-H activation to seven-membered N,O-heterocycles.

Pd-catalyzed allylic C-H activation of simple olefins allows an easy entry to seven-membered N,O-heterocycles such as 1,4-benzoxazepines (1,4-BZOs), 1,4-benzodiazepinones (1,4-BZDs) and 1,4-oxazepanes in good to excellent yields. Straightforward derivatizations of the olefinated 1,4-BZO shows the synthetic utility of this methodology.