Benito Alcaide, Pedro Almendros and Cristina Aragoncillo
Baylis–Hillman adducts derived from enantiopure 1-alkenyl- or alkynyl-4-oxoazetidine-2-carbaldehydes are used for the stereoselective and divergent preparation of highly functionalised β-lactams fused to medium rings through novel, chemocontrolled tandem radical addition–cyclization sequences.