Preparation of methyl (S)-3-amino-3-(3'-pyridyl)propionate dihydrochloride
in high enantiomeric purity by selective crystallization of a diastereomeri
c salt of a carboxylic add precursor (N-BOC-protected) with (1R,2S)-(-)-eph
edrine is described. Further demonstration of the usefulness of this proced
ure to resolve other 3-amino-3-[(substituted)pyridyl]propionic acids is als
o described.