title: Conversion of N-acyl-4-acyloxy-beta-lactams into 1,3-oxazin-6-ones: two consecutive pseudopericyclic processes
abstract: N-Acyl-4-acyloxy-beta-lactams are converted into 1,3-oxazin-6-ones under basic conditions. This transformation is believed to proceed via N-acylazetones, which rearrange to the final products by a sequence of two electrocyclic processes. The calculated (RHF and B3LYP) transition structures of both concerted reactions are shown to present characteristic pseudopericyclic orbital topologies.
authors.affiliation: Departamento de Quimica Organica, Facultad de Quimica, Universidad de Murcia, Spain. alajarin@fcu.um.es
authors.initials: M
authors.lastname: Alajarin
authors.initials: A
authors.lastname: Vidal
authors.initials: P
authors.lastname: Sanchez-Andrada
authors.initials: F
authors.lastname: Tovar
authors.initials: G
authors.lastname: Ochoa