Results Synthesis of the a, &Cyclopropane Analogue of Glutamic Acid. a, P-Cyclopropane- containing amino acids have been synthesized by the addition of diazomethane to an unsaturated oxazolone, ls by the addition of diazomethane to the a, P-dehydroamino acid followed by elimination of N2 from the resulting pyrazoline, lg and through the reaction of appropriately substituted and activated methylene compounds with a 1, 2-hal0alkane.~ O ...