Diphenylnitryl imine

Cycloaddition Reactions. Carbodiimides also react as dipolarophiles in [2+3] cycloaddition reactions. For example, generation of diphenylnitryl imine 292 in the presence of diphenylcarbodiimide affords a spiro compound 293 as the result of the reaction of the initially formed [2+3] cycloadduct with a second equivalent of the nitrile imine. ... 

Unstable, 1,3-dipoles can be generated in chemical reactions or by thermolysis. When these reactions are conducted in the presence of carbodiimides the expected [3+2] ey-cloadducts are formed. For example, generation of the diphenylnitryl imine 174 in the presenee of diphenylcarbodiimide affords a spiro compound 175 as a result of the reaction... 

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See also in sourсe #XX -- [ ]

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