The aza-di-π-methane rearrangement of stable derivatives of 2,2-dimethyl-4,4-diphenylbut-3-enal
Abstract
The sensitised irradiations of the semicarbazone (7a), the benzoylhydrazone (7b), and the oxime benzoate (7c) of 2,2-dimethyl-4,4-diphenylbut-3-enal afford the corresponding derivatives of 2,2-dimethylcyclopropanecarbaldehyde (8a–c) in good yield by an aza-di-π-methane rearrangement.