Anionic [3,3]-sigmatropic rearrangement of N-phenyl-O-acylhydroxylamines to o-aminophenylcetic acids

Article abstract of DOI:10.1016/0040-4039(91)85091-I

N-Phenyl-O-acylhydroxylamines rearrange under basic conditions to afford o-aminophenylacetic acids. The rearrangement can be rationalized in terms of [3,3]-sigmatropic shifts of an enolized N-phenyl-O-acylhydroxyl-amine.