Ma. Klimkin et al., Synthesis of optically active cyclopropyl-substituted imidazolin-2-one based on (+)-4-alpha-acetylcar-2-ene, CHEM NAT CO, 36(6), 2000, pp. 609-610
Cyclopropyl-substituted imidazolin-2-one was synthesized based on the ozono
lysis of (+)-4-alpha -acetylcar-2-ene using the condensation of alpha -brom
oketone and urea as a key step.