REGIOSELECTIVITY IN THE PHOTOCHEMICAL RING CONTRACTION OF 4-DIAZOPYRAZOLIDINE-3,5-DIONES TO GIVE AZA-β-LACTAMS

Article abstract of DOI:10.1016/S0040-4039(00)98647-7

The photochemical decomposition of unsymmetrically substituted 4-diazopyrazolidine-3,5-diones leads to aza-β-lactams, and provides some indication of the relative migratory aptitude of nitrogen groups in the Wolff rearrangement.