Abstract Azomethine ylides (methyl 3-oxido-2-[3, 4-dihydroisoquinolinio]-acrylate, 3-methyl- 2, 4-diphenyloxazolium-5-olate), thiocarbonyl ylides (thiofluorenone S-methylide, thiobenzophenone S-methylide) as well as diazomethane undergo 1, 3-dipolar cycloadditions to the NN-bond of 4-nitrobenzenediazonium salt.
