Features of reactions between (3,5-dioxo-4-azatricyclo-[5.2.1.02-endo,6-endo]dec-8-en-4-yl)carboxylic acids and p-nitrophenyl azide

Reactions were performed of (3,5-dioxo-4-azatricyclo[5.2.1.02-endo,6-endo ]dec-8-en-4-yl)carboxylic acids and their derivatives with p-nitrophenyl azide. A significant fact of the involvement of the carboxy group into the formation of aziridine ring was established and the intermolecular character of this process was confirmed. The structure of compounds synthesized was proved by IR and 1H NMR spectra.