Nucleophilic heteroaromatic substitution. Derivatives of pyrrolo-[2,1-b]oxazole
Abstract
Spectroscopic evidence is utilized in elucidating the structure of 5-acyl-2,3-dihydropyrrolo[2,1-b]oxazoles obtained by intramolecular cyclization of 2-acyl-1-(2-hydroxyethyl)-5-nitropyrroles. Evidence is presented which indicates that the reaction follows an SN path.