Sn. Osipov et al., Novel synthesis of cyclic alpha-amino acid esters via ene reaction and ruthenium-catalyzed ring rearrangement, SYNLETT, (5), 2001, pp. 621-622
New fluorinated unsaturated cyclic alpha -amino acid esters were obtained b
y ene reaction of methylenecycloalkanes with electrophilic imines (CF3)(MeO
2C)C=N-PG, followed by ruthenium-catalyzed ring rearrangement involving mix
ed ROM-RCM metathesis.