Reacticn of 4-nitrophenylazide with the enamines , of 7-oxo-1, 4,5,6-tetraphenylbicyclo [2.2.1]hept-5-en-2-carboxaldehyde , which may be isolated or prepared in from the aldehyde and the appropriate amine, resulted in the formation of a mixture of three products, namely two diastereoisomeric cycloadducts with the spiro [bicyclo-[2.2.1]hept-2-en-7-one [5.4']1',2',3'-triazole) structure and and rearrangement