U. Kazmaier et C. Schneider, STEREOSELECTIVE SYNTHESIS OF UNSATURATED POLYHYDROXYLATED AMINO-ACIDSVIA ESTER ENOLATE CLAISEN REARRANGEMENT, Synlett, (10), 1996, pp. 975
Ester enolate Claisen rearrangement of chelated N-protected chiral all
ylic amino acid esters results in the formation of polyhydroxylated ga
mma,delta-unsaturated amino acids in good yields and with a high degre
e of chirality transfer.