Edgerton et al., Journal of the American Pharmaceutical Association (1912), 1959, vol. 48, p. 320,323
作者:Edgerton et al.
DOI:——
日期:——
Characterization of Z-blocked isomeric dipeptides by fast atom bombardment tandem mass spectrometry and kinetic energy release measurements
作者:Ezio Mammoliti、Giovanni Sindona、Nicola Uccella
DOI:10.1002/oms.1210270422
日期:1992.4
AbstractFast‐ and slow‐reacting, protonated, Z‐blocked (Z = benzyloxycarbonyl) phenylalanylphenylalanine and alanylpbenylalanyl diasteromeric dipeptides undergo decarboxylation through two competing pathways assisted by the migration of the urethane benzyl group either to the terminal or to the amidic nitrogens. The reaction mechanism has been proved by tandem mass spectrometric experiments. The different kinetic energy released associated with CO2 elimination allows the distinction of the S,S from the R,S isomers by moss‐analysed ion kinetic‐energy experiments.