Resolution of alpha-substituted amino acid enantiomers by high-performance liquid chromatography after derivatization with a chiral adduct of o-phthalaldehyde. Application to glutamic acid analogues.
The fluorescent diastereoisomeric adducts formed in a precolumn derivatization reaction of enantiomeric alpha-substituted amino acids with o-phthalaldehyde and N-acetyl-L-cysteine were separated by high-performance liquid chromatography on a conventional reversed-phase column. This method was particularly efficient for the complete analytical resolution of alpha-substituted glutamic acid analogues, such as 2-methylglutamic acid, and several cyclic analogues (1-amino-1,3-dicarboxycyclohexane, 1-amino-1,3-dicarboxy-2-cyclohexene and 1-amino-1,3-dicarboxycyclopentane). The order of elution from the column was correlated with the absolute configuration of the derivatives.
Maurs
M
M
Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, UA 400 CNRS, Unviersité R. Descartes, Paris, France.
Trigalo
F
F
Azerad
R
R
D000596:Amino Acids / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D005971:Glutamates / Q000032:analysis*; D013237:Stereoisomerism; D009764:o-Phthalaldehyde
D000596:Amino Acids; D005971:Glutamates; D009764:o-Phthalaldehyde