Nitrosation of the N-acetylhydrazones of benzophenone, acetophenone, cyclohexanone, and heptaldehyde af-fords the corresponding 1-acetoxy-1-azido compounds, ketones (or aldehydes), and acetyl azide as the principal products. The unstable N-nitrosoamide is undoubtedly formed in the first step of the reaction; a rearrangement to a diazo ester and migration of the carboxylate group complete the process. Minor products of the reaction ...