Decomposition of Protonated Threonine, Its Stereoisomers, and Its Homologues in the Gas Phase: Evidence for Internal Backside Displacement
作者:Scott V. Serafin、Kangling Zhang、Luigi Aurelio、Andrew B. Hughes、Thomas Hellman Morton
DOI:10.1021/ol049700p
日期:2004.5.1
Protonated threonine and its allo diastereomer exhibit different proportions of collisionally activated dissociation (CAD) product ions. N-Methylation attenuates these differences. Water loss from protonated allo-threonine gives protonated trans-3-methylaziridinecarboxylic acid via an internal S(N)2 pathway, rather than protonated vinylglycine.