The 1, 3-dipolar cycloaddition of N-methyl-and N-phenyl-C-phenylnitrone with several allenes has been investigated. In the case of dimethylallene, a 1: l mixture of products derived from dipolar cycloaddition across both n-bonds was obtained. The formation of a benzazepinone derivative from this reaction was rationalized in terms of a subsequent rearrangement of a transient 5-methyleneisoxazolidine. In contrast to this result, ...
