β-Lactam-cleavage reactions of isopenam-3-carboxylates and their 2,2-dioxides
Abstract
β-Lactam-cleavage reactions of the 3-exo- and 3-endo-isomers of t-butyl isopenam-3-carboxylate, i.e.(2a) and (3a), and of 3-t-butoxycarbonylisopenam 2,2-dioxide, i.e.(2b) and (3b), induced by trifluoroacetic acid, are not accompanied or followed by 2,3-bond ruptures.