Synthesis of cyclic azomethine imines from aza .beta.-lactams. Conversion of 3-oxo-1,2-diazetidinium tosylates into 1-substituted 3-oxo-1,2-diazetidinium inner salts
Cyclicazomethine imines, in which the ring is four-membered, have been synthesized by thermal decomposition of the readily available 2-hydrazono-Δ3-1,3,4-oxadiazolines. Possible mechanisms, involv...