Catalytic cyclopropanation of alkyl 2-allyl-2-acetylaminomalonate and methyl N-(acetyl)(phenyl)dehydroalanine with alkyl diazoacetates

Cyclopropane analogs of aspartic and adipic acids were prepared by catalytic cyclopropanation of dehydro amino acid derivatives with alkyl diazoacetates in the presence of catalyst (dirhodium tetraacetate).