Electrochemical reactions of dihydroazaazulanones possessing a spirocyclic moiety: Ring cleavages of the spiro-rings, hydrogen migrations and formations of azaazulanones

Electrochemical oxidations of dihydroazaazulanones possessing a spirocyclic moiety afforded two types of dihydroaza-azulonones and one type of azaazulanones. The reaction is considered to proceed via a ring cleavage of the spiro-three membered ring followed by a hydrogen migration.