The [3+2] cycloaddition of diphenyldiazomethane and ethyl diazoacetate with itaconic anhydride. A new access to spiranic cyclopropane derivatives

Roussel, ChristopheCiamala, KabulaMélot, Jean-MarieVebrel, JoëlRiche, Claude2008-10-212008-10-212008-10-21200210.3184/030823402103172617https://infoscience.epfl.ch/handle/20.500.14299/30382The reaction of itaconic anhydride with N2:CHCO2Et or Ph2C:N2 gave the expected spiro-derivs., which spontaneously rearranged; specifically, the adduct from Ph2C:N2 loses a dinitrogen mol., yielding a spirocyclopropane related to the known 5-azaspiro[2.4]heptane-4,6-diones or 5-azaspiro[2.4]heptanes.The [3+2] cycloaddition of diphenyldiazomethane and ethyl diazoacetate with itaconic anhydride. A new access to spiranic cyclopropane derivativestext::journal::journal article::research article