title: One-pot synthesis of polyfunctionalized cyclic urea derivatives.
abstract: [reaction: see text] Unexpectedly, imidazolidin-2-ones are easily obtained from beta-keto esters upon treatment with tert-butyl nosyloxycarbamate and calcium oxide under mild conditions. The structure of the product was established by X-ray crystallography.
authors.affiliation: Dipartimento di Chimica dell'Università degli Studi di Roma La Sapienza, P.le Aldo Moro 2, I-00185 Roma, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Fioravanti
authors.forename: Fabio
authors.initials: F
authors.lastname: Marchetti
authors.forename: Alberto
authors.initials: A
authors.lastname: Morreale
authors.forename: Lucio
authors.initials: L
authors.lastname: Pellacani
authors.forename: Paolo A
authors.initials: PA
authors.lastname: Tardella
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry; D014508:Urea / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D014508:Urea; C016538:lime