M. Falorni et G. Giacomelli, AN EFFICIENT STEREOCONTROLLED SYNTHESIS OF -2-CARBOXY-4-(3-PHOSHONOPROPYL)PIPERAZUBE[(R)-CPP], Synlett, (2), 1996, pp. 143-144
The amino acid (R)-CPP (1), a selective antagonist of the NMDA recepto
r, is prepared directly in enantiopure form starting from L-serine and
sarcosine.