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Communication | Special issue | Vol 82, No. 1, 2010, pp.263-271
Published online, 22nd June, 2010
DOI: 10.3987/COM-10-S(E)39
A Flexible Route to 4-Substituted β-Lactams

Béatrice Quiclet-Sire* and Samir Z. Zard*

*CNRS UMR 7652, Laboratoire de Synthèse Organique Associé, Ecole Polytechnique, F-91128 Palaiseau, France


A variety of 4-substituted β-lactams can be readily prepared by the radical addition-transfer of 4-S-xanthyl-azetidinones to unactivated olefins. For this radical chain process to operate efficiently it is necessary to place an acyl group on the nitrogen of the azetidinone ring.