Alkyliminomalonic acid and 2-alkyloxaziridine-3, 3-dicarboxylic acid esters

2-Alkyloxaziridine-3, 3-dicarboxylic acid esters have been obtained by oxidizing alkylaminomalonic acid esters by monoperphthalic acid. The activation parameters for the inversion of the nitrogen atom have been obtained for a number of alkyliminomalonic acid and 2-alkyloxaziridine-3, 3-dicarboxylic acid ester.